CN110126407B - High-temperature-resistant steaming and boiling easy-to-tear film base material film, easy-to-tear film containing same and preparation method - Google Patents
High-temperature-resistant steaming and boiling easy-to-tear film base material film, easy-to-tear film containing same and preparation method Download PDFInfo
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- CN110126407B CN110126407B CN201910303439.4A CN201910303439A CN110126407B CN 110126407 B CN110126407 B CN 110126407B CN 201910303439 A CN201910303439 A CN 201910303439A CN 110126407 B CN110126407 B CN 110126407B
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000010025 steaming Methods 0.000 title abstract description 4
- 238000002360 preparation method Methods 0.000 title description 7
- 238000009835 boiling Methods 0.000 title description 3
- 239000010410 layer Substances 0.000 claims abstract description 93
- 239000000155 melt Substances 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 20
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 20
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000003851 corona treatment Methods 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 229920005677 ethylene-propylene-butene terpolymer Polymers 0.000 claims description 4
- 239000010408 film Substances 0.000 abstract description 66
- 239000013039 cover film Substances 0.000 abstract description 3
- -1 ethylene propylene butylene Chemical group 0.000 abstract description 2
- 239000005022 packaging material Substances 0.000 abstract description 2
- 229920001897 terpolymer Polymers 0.000 abstract description 2
- 230000004888 barrier function Effects 0.000 description 12
- 238000007639 printing Methods 0.000 description 11
- 239000004677 Nylon Substances 0.000 description 8
- 229920001778 nylon Polymers 0.000 description 8
- 239000002131 composite material Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000008157 edible vegetable oil Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004775 Tyvek Substances 0.000 description 1
- 229920000690 Tyvek Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010096 film blowing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/308—Heat stability
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of packaging materials, and particularly relates to an easy-to-tear film. The utility model provides a constant and sealed firm easy film substrate membrane of taking off of seal intensity, includes corona layer, intermediate level, the heat-seal layer that co-extrusion formed from outside to interior in proper order, the material of corona layer is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 20-50:100, wherein the material of the middle layer is metallocene HDPE, the melt index is 0.5-1g/10min, and the material of the heat sealing layer is ethylene propylene butylene terpolymer. When the invention is heat-sealed with pp cup material, the heat-sealing strength is 15-29N/15MM on the premise of meeting the food safety, so that the cover film is convenient for a consumer to uncover, the use of the consumer is convenient, and the cup material can resist the steaming at 121 ℃.
Description
Technical Field
The invention belongs to the technical field of packaging materials, and particularly relates to an easy-to-tear film.
Background
The easy-to-tear film material is widely applied to various packages and used for covering films of bowl-shaped, cup-shaped, barrel-shaped and box-shaped containers made of PP materials. Or TYVEK heat-sealing with HDPE, the heat-sealing strength of the sealing film commonly used in the market increases with the rise of heat-sealing temperature, and when the container is firmly sealed, the cover film cannot be uncovered. The film is easy to be uncovered by high-temperature steaming and boiling in a tape casting mode, the required order quantity is large, and the formula is not changed.
Disclosure of Invention
The invention aims to provide an easy-to-tear film base material film which is convenient to prepare, can seal a packaging container, has constant heat sealing strength and is firm in sealing and sealing, a preparation method of the easy-to-tear film base material film, and an easy-to-tear film adopting the base material film as a heat sealing layer.
The technical scheme of the invention is as follows:
The utility model provides a constant and sealed firm easy film substrate membrane of taking off of seal of intensity, includes corona layer, intermediate level, the heat seal layer that co-extrusion formed in proper order from outside to inside, its characterized in that, the corona layer material is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 20-50:100, wherein the intermediate layer material is metallocene HDPE, the melt index is 0.5-1g/10min, and the heat sealing layer material is ethylene propylene butylene terpolymer.
Further, the melt temperature of the corona layer material is 190-240 ℃.
Further, the melt temperature of the interlayer material is 200-240 ℃.
Further, the melt temperature of the heat seal layer material is 200-240 ℃.
Further, the thickness of the heat sealing layer is 6-15 mu m.
The preparation method of the easily-uncovered film base material film with constant heat sealing strength and firm sealing comprises the following steps: and respectively adding raw material resins corresponding to the corona layer, the middle layer and the heat sealing layer into respective extruder charging barrels by adopting a three-layer coextrusion process, controlling the melt temperature of the corona layer resin to be 190-240 ℃, controlling the melt temperature of the middle layer resin to be 200-240 ℃, extruding molten plastics, blowing and cooling, drawing and shaping, and carrying out corona treatment to obtain the easy-to-tear film base material film.
An easy-to-tear film of the easy-to-tear film substrate film. The substrate film of the invention is the lowest layer (namely a heat sealing layer) of the easy-to-tear film, namely a layer directly heat-sealed with the box body or the cup body, and is generally a composite barrier layer film on the substrate film and a composite printing layer film on the barrier layer. The materials of the barrier layer and the printing layer, and the composite process of the substrate film, the barrier layer and the printing layer belong to the conventional technology in the field, and are not described in detail in this time.
The invention has the following beneficial effects:
1. compared with the conventional products, the product has better temperature resistance, and the temperature resistance can reach 121 ℃ on the premise of not changing the product performance, so that the requirements of customers on sterilization can be better met for food safety, and the food safety is ensured.
2. When the invention is heat-sealed with pp cup material, on the premise of meeting food safety, the heat-sealing stability is good, the heat-sealing strength is 15-29N/15MM, the cover film is convenient for consumers to uncover, and the use of consumers is convenient.
Detailed Description
The present invention will be described in detail with reference to the following examples, which are only preferred embodiments of the present invention and are not limiting thereof.
In the present invention, the melt index was measured according to the melt index test Standard ASTM D1238 for elastomers, with PP test conditions of 2.16Kg at 230 ℃. The metallocene HDPE experimental conditions were 2.16Kg at 190 ℃. The limitation of the melt index of the material can ensure the use effect of the material after film blowing molding and the use process of the processing process.
Example 1
The utility model provides a constant and sealed firm easy film substrate membrane of taking off of seal of intensity, includes corona layer, intermediate level, the heat seal layer that co-extrusion formed from outside to interior in proper order, and wherein, the corona layer material is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 20:100, the melt temperature was 200 ℃. The intermediate layer material is metallocene HDPE, the melt index is 0.5g/10min, the melt temperature is 200 ℃, the heat-seal layer material is ethylene propylene butene terpolymer, and the melt temperature is 200 ℃.
The total thickness of the substrate film of this example was 70 μm, and the thickness ratio of the corona layer, the intermediate layer, and the heat-seal layer was: 35%, 55% and 10%.
The preparation method of the substrate film comprises the following steps:
And respectively adding raw material resins corresponding to the corona layer, the middle layer and the heat sealing layer into respective extruder charging barrels by adopting a three-layer coextrusion process, controlling the melt temperature of the corona layer resin to be 200 ℃, controlling the melt temperature of the middle layer resin to be 200 ℃, extruding molten plastics, blowing, cooling, drawing and shaping, and carrying out corona treatment to obtain the easy-to-tear film base material film.
The easy-to-tear film with constant heat sealing strength and firm sealing is formed by sequentially adhering a printing layer, a barrier layer and the substrate film from outside to inside by using an adhesive. Wherein the printing layer is made of PET, and the barrier layer is made of Nylon (NY).
Example 2
The utility model provides a constant and sealed firm easy film substrate membrane of taking off of seal of intensity, includes corona layer, intermediate level, the heat seal layer that co-extrusion formed from outside to interior in proper order, and wherein, the corona layer material is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 50:100, melt temperature 240 ℃. The intermediate layer material is metallocene HDPE, the melt index is 1g/10min, the melt temperature is 240 ℃, the heat seal layer material is ethylene propylene butene terpolymer, and the melt temperature is 240 ℃.
The total thickness of the substrate film of this example was 70 μm, and the thickness ratios of the corona layer, the intermediate layer, and the heat seal layer were respectively: 35%, 50% and 15%.
The preparation method of the substrate film comprises the following steps:
And respectively adding raw material resins corresponding to the corona layer, the middle layer and the heat sealing layer into respective extruder charging barrels by adopting a three-layer coextrusion process, controlling the melt temperature of the corona layer resin to 240 ℃, controlling the melt temperature of the middle layer resin to 240 ℃, controlling the melt temperature of the heat sealing layer resin to 240 ℃, extruding molten plastics, blowing, cooling, drawing and shaping, and carrying out corona treatment to obtain the film-uncovering substrate film. The easy-to-tear film with constant heat sealing strength and firm sealing is formed by sequentially adhering a printing layer, a barrier layer and the substrate film from outside to inside by using an adhesive. Wherein the printing layer is made of PET, and the barrier layer is made of AL.
Example 3
The utility model provides a constant and sealed firm easy film substrate membrane of taking off of seal of intensity, includes corona layer, intermediate level, the heat seal layer that co-extrusion formed from outside to interior in proper order, and wherein, the corona layer material is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 30:100, the melt temperature was 210 ℃. The intermediate layer material is metallocene HDPE, the melt index is 0.8g/10min, the melt temperature is 210 ℃, the heat-seal layer material is ethylene propylene butene terpolymer, and the melt temperature is 210 ℃.
The total thickness of the substrate film of this example was 70 μm, and the thicknesses of the corona layer, the intermediate layer, and the heat-seal layer were respectively: 35%, 53% and 12%.
The preparation method of the substrate film comprises the following steps:
And respectively adding raw material resins corresponding to the corona layer, the middle layer and the heat sealing layer into respective extruder charging barrels by adopting a three-layer coextrusion process, controlling the melt temperature of the corona layer resin to be 210 ℃, controlling the melt temperature of the middle layer resin to be 210 ℃, extruding molten plastics, cooling by blowing, drawing and shaping, and carrying out corona treatment to obtain the easy-to-tear film base material film. The easy-to-tear film with constant heat sealing strength and firm sealing is formed by sequentially adhering a printing layer, a barrier layer and the substrate film from outside to inside by using an adhesive. Wherein the printing layer is made of NY, and the barrier layer is made of NY.
The substrate film prepared in example 1 was heat-sealed with a PP sheet, and the heat-seal strength was tested, with the following results:
As can be seen from the above table, the heat sealing strength of the substrate film and the PP sheet can reach 5-12N/15mm under the heat sealing conditions of 170-230 ℃,2Kg pressure and 0.5 seconds, and the heat sealing strength is kept at 5-11.8N/15mm after the substrate film and the PP sheet are placed for 7 months at normal temperature. Therefore, the substrate film and the PP sheet have good heat sealing stability.
Laminating the substrate film prepared in the embodiment 1 with the nylon NY of the barrier layer and the adhesive for PET of the printing layer to obtain an easy-to-tear film, wherein the thicknesses of the substrate film, the nylon NY of the barrier layer and the PET of the printing layer are respectively as follows: the heat seal strength was measured at 70 μm, 15 μm and 12 μm and the results were as follows:
As can be seen from the above table, the substrate film of the present invention was used as a heat seal layer, and the prepared PET12 μm/NY15 μm/substrate film of example 1 was used as an easy-to-peel film of a three-layer composite structure, heat-sealed with a PP cup material under a pressure of 4Kg for 3 seconds at a heat-seal knife temperature of 150 to 230℃and a heat-seal strength of 20 to 25.6N/15mm, and the consumer could easily peel off the lidding film. In addition, after being placed for 2 years and 7 months at normal temperature, being soaked in edible oil for 2 months, being soaked in edible oil for 8 months, being soaked in edible oil for 2 years and 7 months, being soaked in water for 2 months, being soaked in water for 8 months, being soaked in water for 2 years and 7 months, the heat sealing strength is 20.3-26.4N/15mm、15.8-35.6N/15mm、15.7-29.9N/15mm、15.2-25.9N/15mm、17.8-26.6N/15mm、17-29.7N/15mm、14.9-24.8N/15mm. respectively, and the substrate film can be heat-sealed in the temperature range of 150-230 ℃ and has relatively constant heat sealing strength with a PP substrate.
The easy-to-tear film prepared in examples 1 to 3 was heat-sealed with PP cup material, the heat-sealing temperature was set to 170 ℃, to obtain an easy-to-tear PP cup, and the easy-to-tear PP cup was cooked in a high-temperature cooker at 121 ℃ for 30 minutes, and various properties thereof were tested, and the results showed that: can keep the original gas-proof and oxygen-proof performances of the composite film, the easy uncovering performance of the composite film and the cup body, and the other performances are basically consistent with those in the normal state, and no obvious deformation, shrinkage and the like exist. It can be seen that the substrate film of the present invention has the advantage of being resistant to autoclaving.
Claims (3)
1. The utility model provides a constant and seal firm easy film substrate membrane of taking off of seal of heat seal intensity, includes corona layer, intermediate level, the heat seal layer that co-extrusion formed in proper order from outside to inside, its characterized in that, the corona layer material is the blend of PP and metallocene HDPE, and the weight ratio of PP and metallocene HDPE is 20:100, wherein the temperature of the melt is 200 ℃; the intermediate layer material is metallocene HDPE, the melt index is 0.5g/10min, and the melt temperature is 200 ℃; the heat-sealing layer is made of ethylene propylene butene terpolymer, and the melt temperature is 200 ℃; the total thickness of the substrate film is 70 mu m, and the thickness ratio of the corona layer, the intermediate layer and the heat seal layer is as follows: 35%, 55%, 10%;
The easy-to-tear film base material film is heat-sealed with the PP sheet, and the heat-sealing strength reaches 5-12N/15mm under the heat-sealing conditions of 170-230 ℃ and 2Kg pressure for 0.5 seconds.
2. A method for preparing the film substrate film which has constant heat sealing strength and firm sealing, and is characterized in that: and respectively adding raw material resins corresponding to the corona layer, the middle layer and the heat sealing layer into respective extruder charging barrels by adopting a three-layer coextrusion process, controlling the melt temperature of the corona layer resin to be 190-240 ℃, controlling the melt temperature of the middle layer resin to be 200-240 ℃, extruding molten plastics, blowing and cooling, drawing and shaping, and carrying out corona treatment to obtain the easy-to-tear film base material film.
3. An easy release film comprising the easy release film substrate film of claim 1.
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| CN201910303439.4A CN110126407B (en) | 2019-04-16 | 2019-04-16 | High-temperature-resistant steaming and boiling easy-to-tear film base material film, easy-to-tear film containing same and preparation method |
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| CN201910303439.4A CN110126407B (en) | 2019-04-16 | 2019-04-16 | High-temperature-resistant steaming and boiling easy-to-tear film base material film, easy-to-tear film containing same and preparation method |
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| CN110126407B true CN110126407B (en) | 2024-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112659707B (en) * | 2020-12-17 | 2022-10-28 | 浙江大汇新材料有限公司 | Easy-to-tear food packaging cover film and preparation method thereof |
| CN113427871A (en) * | 2021-05-13 | 2021-09-24 | 惠州德昉高分子膜材料有限公司 | Easily-torn film material capable of resisting high-temperature cooking and preparation method thereof |
| CN113427872A (en) * | 2021-05-13 | 2021-09-24 | 惠州德昉高分子膜材料有限公司 | PP/PE easy-to-tear film material and preparation method thereof |
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| CN101987674A (en) * | 2009-08-07 | 2011-03-23 | 上海紫藤包装材料有限公司 | Easily-peeling film with constant heat seal strength and firm seal |
| CN201573373U (en) * | 2009-11-10 | 2010-09-08 | 江阴升辉包装材料有限公司 | Full-plastic multi-layer co-extrusion sheet |
| CN107283980A (en) * | 2017-07-05 | 2017-10-24 | 永新股份（黄山）包装有限公司 | A kind of digestion resistant polyethylene film and its production technology |
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Address after: 516032 plant a, Kangnian Industrial Park, Lilin Town, Puxin village, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant after: Huizhou Defang polymer membrane material Co.,Ltd. Address before: 516032 floor 1, building C, Fusheng company, south of Lianfa Avenue, Tongqiao Town, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant before: HUIZHOU DEFANG PACKAGING MATERIALS Co.,Ltd. |
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