CN113492567A - Biaxially oriented polypropylene film with high transverse extensibility and preparation method thereof - Google Patents
Biaxially oriented polypropylene film with high transverse extensibility and preparation method thereof Download PDFInfo
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- CN113492567A CN113492567A CN202110692490.6A CN202110692490A CN113492567A CN 113492567 A CN113492567 A CN 113492567A CN 202110692490 A CN202110692490 A CN 202110692490A CN 113492567 A CN113492567 A CN 113492567A
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- biaxially oriented
- oriented polypropylene
- polypropylene film
- raw materials
- surface layer
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- 229920006378 biaxially oriented polypropylene Polymers 0.000 title claims abstract description 35
- 239000011127 biaxially oriented polypropylene Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 41
- 239000002344 surface layer Substances 0.000 claims abstract description 32
- 239000012792 core layer Substances 0.000 claims abstract description 19
- 238000009998 heat setting Methods 0.000 claims abstract description 18
- 239000004743 Polypropylene Substances 0.000 claims abstract description 15
- 229920001577 copolymer Polymers 0.000 claims abstract description 13
- 239000012745 toughening agent Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 7
- 239000002216 antistatic agent Substances 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims 1
- 239000000454 talc Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 3
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 229940075529 glyceryl stearate Drugs 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical class CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000002453 shampoo Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- -1 sodium alkylsulfonate Chemical class 0.000 description 1
Classifications
-
- 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
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
-
- 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
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- 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
- B32B2307/51—Elastic
-
- 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
- B32B2307/558—Impact strength, toughness
-
- 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
- B32B2519/00—Labels, badges
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a high-transverse-extensibility biaxially oriented polypropylene film and a preparation method thereof, relating to the technical field of BOPP films, and the film is composed of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is composed of the following raw materials in percentage by weight: 40-50% of PP raw material, 40-50% of PP-PE copolymer, 5-10% of toughening agent and 2-3% of antistatic agent; the upper and lower surface layers are composed of the following raw materials in percentage by weight: 90-95% of PP raw material and 5-10% of anti-sticking master batch; the preparation of the film is that each layer of raw materials are melted, converged and extruded, and then the raw materials are attached by a cold roller and an air knife to obtain a cast sheet; longitudinally stretching the cast sheet to obtain a sheet, carrying out primary heat setting treatment on the sheet at the temperature of 180-190 ℃, cooling, transversely stretching, carrying out secondary heat setting treatment at the temperature of 170-180 ℃, and cooling. According to the invention, the PP-PE copolymer and the toughening agent are added into the core layer, the sheet is subjected to heat setting treatment before transverse stretching, and the transverse stretching multiplying power range is controlled, so that the extensibility of the film is effectively improved under the condition of ensuring the strength, and the transverse elongation is more than or equal to 120%.
Description
Technical Field
The invention relates to the technical field of BOPP films, in particular to a biaxially oriented polypropylene film with high transverse extensibility and a preparation method thereof.
Background
The biaxially oriented polypropylene film (BOPP) has the advantages of light weight, no toxicity, no odor, moisture resistance, high mechanical strength, good dimensional stability, good printing performance, good transparency and the like, and is one of the most widely applied plastic film varieties at present. The BOPP label film is one of the main application modes of the BOPP thick film at present, and is widely applied to daily chemical products such as transparent bottle bodies, daily chemical shower gel, shampoo, laundry detergent, cosmetics and the like. But the application of the BOPP film in the field of soft labeling and other occasions requiring high transverse extensibility is limited due to low transverse fracture elongation and poor extensibility.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a biaxially oriented polypropylene film with high transverse extensibility and a preparation method thereof.
The invention provides a high-transverse-extensibility biaxially oriented polypropylene film which sequentially comprises an upper surface layer, a core layer and a lower surface layer, wherein the core layer is composed of the following raw materials in percentage by weight: 40-50% of PP raw material, 40-50% of PP-PE copolymer, 5-10% of toughening agent and 2-3% of antistatic agent;
the upper surface layer and the lower surface layer are composed of the following raw materials in percentage by weight: 90-95% of PP raw material and 5-10% of anti-sticking master batch.
Preferably, the PP-PE copolymer comprises 10 wt% of PE and the balance of PP.
Preferably, the toughening agent is composed of any one of ethylene-octene copolymer, polyamide and hydrogenated SBS and nano rigid particles.
Preferably, the nano rigid particles are one of calcium carbonate, barium sulfate and talcum powder, and the particle diameter ranges from 0.0.1 to 0.05 μm.
Preferably, the film thickness is 40-70 μm.
The invention also provides a preparation method of the biaxially oriented polypropylene film with high transverse extensibility, which comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different double-screw extruders for melting, conveying the raw materials into a three-layer structure die head for converging and extruding, and attaching the raw materials by a cold roller and an air knife to obtain a cast sheet;
s2, longitudinally stretching the cast sheet to obtain a sheet, carrying out primary heat setting treatment on the sheet at 190 ℃ under 180 ℃ plus the temperature, cooling to 40-50 ℃, carrying out transverse stretching, carrying out secondary heat setting treatment at 180 ℃ under 170 plus the temperature, and cooling to room temperature to obtain the high transverse extensibility biaxially oriented polypropylene film.
Preferably, the transverse stretching is performed at a magnification of 4.0 to 5.0.
Preferably, the first heat-setting treatment is carried out in an oven for 2-3S, and the second heat-setting treatment is carried out in a cross-draw box in a production line for 4-5S.
Has the advantages that: the invention provides a high-transverse-extensibility biaxially oriented polypropylene film, which is characterized in that a PP-PE copolymer material and a toughening agent are added into a core layer, a sheet is subjected to heat setting treatment before transverse stretching, the transverse stretching multiplying power range is controlled, and the extensibility of the film is effectively improved under the condition of ensuring the strength. Compared with the 40-50% transverse elongation of the existing biaxially oriented polypropylene film, the transverse elongation of the film prepared by the invention is more than or equal to 120%, and the tensile strength is more than or equal to 150MPa, so that the application requirements of the soft labeling field and other high transverse elongation requirements can be met.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
In the following examples, the PP-PE copolymer contained 10% by weight of PE and the remainder PP.
In the present invention, the main component of the antistatic agent is not particularly limited, and may be at least one of ethoxylated lauryl amine, glyceryl stearate, and sodium alkylsulfonate, and glyceryl stearate is selected in the following examples; the main component of the anti-sticking master batch is not particularly limited, and may be at least one of silica, polymethyl methacrylate, and calcium carbonate, and silica is used in the following examples.
Example 1
The invention provides a high-transverse-extensibility biaxially oriented polypropylene film, which is 40 mu m thick and sequentially consists of an upper surface layer, a core layer and a lower surface layer; the core layer is prepared from the following raw materials in percentage by weight: 40% of PP raw material, 50% of PP-PE copolymer, 8% of toughening agent and 2% of antistatic agent; the components of the upper and lower surface layers are the same and are composed of the following raw materials in percentage by weight: 90% of PP raw material and 10% of anti-sticking master batch; wherein the toughening agent is prepared from ethylene-octene and calcium carbonate nanoparticles according to a weight ratio of 98: 2 by weight ratio.
The preparation method of the film comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different double-screw extruders for melting, conveying the raw materials into a three-layer structure die head for converging and extruding, and attaching the raw materials by a cold roller and an air knife to obtain a cast sheet;
s2, longitudinally stretching the cast sheet to obtain a sheet, carrying out primary heat setting treatment on the sheet at 180 ℃ for 2S, then cooling to 40 ℃, carrying out transverse stretching with the stretching ratio of 4.0, then carrying out secondary heat setting treatment at 170 ℃ for 4S, and then cooling to room temperature to obtain the high transverse extensibility biaxially oriented polypropylene film.
Example 2
The invention provides a high-transverse-extensibility biaxially oriented polypropylene film, which has the thickness of 50 mu m and sequentially consists of an upper surface layer, a core layer and a lower surface layer; the core layer is prepared from the following raw materials in percentage by weight: 45% of PP raw material, 45% of PP-PE copolymer, 7% of toughening agent and 3% of antistatic agent; the components of the upper and lower surface layers are the same, and the upper and lower surface layers are composed of the following raw materials in percentage by weight: 92% of PP raw material and 8% of anti-sticking master batch; wherein the toughening agent is prepared from ethylene-octene high polymer and talcum powder nano-particles according to the weight ratio of 98: 2 by weight ratio.
The preparation method of the film comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different double-screw extruders for melting, conveying the raw materials into a three-layer structure die head for converging and extruding, and attaching the raw materials by a cold roller and an air knife to obtain a cast sheet;
s2, longitudinally stretching the cast sheet to obtain a sheet, carrying out first heat setting treatment on the sheet at 185 ℃ for 2.5S, then cooling to 45 ℃, carrying out transverse stretching with the stretching ratio of 4.5, then carrying out second heat setting treatment at 175 ℃ for 4.5S, and then cooling to room temperature to obtain the high transverse extensibility biaxially oriented polypropylene film.
Example 3
The invention provides a high-transverse-extensibility biaxially oriented polypropylene film, which is 70 mu m thick and sequentially consists of an upper surface layer, a core layer and a lower surface layer; the core layer is prepared from the following raw materials in percentage by weight: 50% of PP raw material, 42% of PP-PE copolymer, 5% of toughening agent and 3% of antistatic agent; the components of the upper and lower surface layers are the same, and the upper and lower surface layers are composed of the following raw materials in percentage by weight: 95% of PP raw material and 5% of anti-sticking master batch; wherein, the toughening agent is prepared from hydrogenated SBS and calcium carbonate nano particles according to the weight ratio of 98: 2 by weight ratio.
The preparation method of the film comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different double-screw extruders for melting, conveying the raw materials into a three-layer structure die head for converging and extruding, and attaching the raw materials by a cold roller and an air knife to obtain a cast sheet;
s2, longitudinally stretching the cast sheet to obtain a sheet, carrying out primary heat setting treatment on the sheet at 190 ℃ for 3S, then cooling to 50 ℃, carrying out transverse stretching with the stretching ratio of 5.0, then carrying out secondary heat setting treatment at 180 ℃ for 5S, and then cooling to room temperature to obtain the high transverse extensibility biaxially oriented polypropylene film.
The properties of examples 1-3 were examined and compared using a commercially available ordinary BOPP film (PP-50 μm) as a comparative example. The results are shown in Table 1.
TABLE 1 data for the performance tests of BOPP films of examples 1-3 and comparative examples
According to the results in table 1, the BOPP film prepared by the present invention has good other properties while the transverse extensibility of the film is significantly improved. Especially, the embodiment 1 can fully meet the process requirements of customers with higher requirements.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The biaxially oriented polypropylene film with high transverse extensibility is composed of an upper surface layer, a core layer and a lower surface layer in sequence, and is characterized in that the core layer is composed of the following raw materials in percentage by weight: 40-50% of PP raw material, 40-50% of PP-PE copolymer, 5-10% of toughening agent and 2-3% of antistatic agent;
the upper surface layer and the lower surface layer are composed of the following raw materials in percentage by weight: 90-95% of PP raw material and 5-10% of anti-sticking master batch.
2. The biaxially oriented polypropylene film of claim 1, wherein the weight percentage of PE in the PP-PE copolymer is 10%, and the remainder is PP.
3. The biaxially oriented polypropylene film of claim 1, wherein the toughening agent is composed of nano-rigid particles and any one of ethylene-octene copolymer, polyamide and hydrogenated SBS.
4. The biaxially oriented polypropylene film of claim 3, wherein the nano rigid particles are one of calcium carbonate, barium sulfate and talc, and have a particle diameter in the range of 0.0.1-0.05 μm.
5. The biaxially oriented polypropylene film of claim 1, wherein the film thickness is 40 to 70 μm.
6. A method for producing a biaxially oriented polypropylene film having a high transverse extensibility as claimed in any one of claims 1 to 5, comprising the steps of:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different double-screw extruders for melting, conveying the raw materials into a three-layer structure die head for converging and extruding, and attaching the raw materials by a cold roller and an air knife to obtain a cast sheet;
s2, longitudinally stretching the cast sheet to obtain a sheet, carrying out primary heat setting treatment on the sheet at 190 ℃ under 180 ℃ plus the temperature, cooling to 40-50 ℃, carrying out transverse stretching, carrying out secondary heat setting treatment at 180 ℃ under 170 plus the temperature, and cooling to room temperature to obtain the high transverse extensibility biaxially oriented polypropylene film.
7. The method for producing a biaxially oriented polypropylene film having a high transverse extensibility as claimed in claim 5, wherein the transverse stretching is performed at a ratio of 4.0 to 5.0.
8. The method for producing a biaxially oriented polypropylene film having a high transverse extensibility as claimed in claim 5, wherein the first heat-setting treatment is carried out in an oven for 2 to 3 seconds and the second heat-setting treatment is carried out in a production line draw box for 4 to 5 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692490.6A CN113492567A (en) | 2021-06-22 | 2021-06-22 | Biaxially oriented polypropylene film with high transverse extensibility and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692490.6A CN113492567A (en) | 2021-06-22 | 2021-06-22 | Biaxially oriented polypropylene film with high transverse extensibility and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113492567A true CN113492567A (en) | 2021-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110692490.6A Pending CN113492567A (en) | 2021-06-22 | 2021-06-22 | Biaxially oriented polypropylene film with high transverse extensibility and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474935A (en) * | 2022-03-02 | 2022-05-13 | 安徽维龙新材料科技有限公司 | Multilayer co-extrusion BOPP (biaxially-oriented Polypropylene) film with ultrahigh tensile strength and preparation method thereof |
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| CN101791889A (en) * | 2010-01-29 | 2010-08-04 | 浙江凯利包装材料有限公司 | Heat-resisting isolated biaxially oriented polypropylene film and manufacturing method thereof |
| CN103275372A (en) * | 2013-05-21 | 2013-09-04 | 苏州旭光聚合物有限公司 | Wear-resistant PP (Propene Polymer)/PE (Poly Ethylene) composite |
| CN104553218A (en) * | 2015-01-13 | 2015-04-29 | 浙江凯利新材料股份有限公司 | Ultralow-temperature heat-seal two-way stretching polypropylene film and preparation method thereof |
| CN105273304A (en) * | 2014-07-24 | 2016-01-27 | 天津市科润特包装有限公司 | Low-temperature anti-impact modified PP/PE blending material |
| CN105482260A (en) * | 2016-01-19 | 2016-04-13 | 凯威塑胶工业有限公司 | BOPP (biaxially-oriented polypropylene) bag making film for high and cold area and preparation method of BOPP bag making film |
-
2021
- 2021-06-22 CN CN202110692490.6A patent/CN113492567A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791889A (en) * | 2010-01-29 | 2010-08-04 | 浙江凯利包装材料有限公司 | Heat-resisting isolated biaxially oriented polypropylene film and manufacturing method thereof |
| CN103275372A (en) * | 2013-05-21 | 2013-09-04 | 苏州旭光聚合物有限公司 | Wear-resistant PP (Propene Polymer)/PE (Poly Ethylene) composite |
| CN105273304A (en) * | 2014-07-24 | 2016-01-27 | 天津市科润特包装有限公司 | Low-temperature anti-impact modified PP/PE blending material |
| CN104553218A (en) * | 2015-01-13 | 2015-04-29 | 浙江凯利新材料股份有限公司 | Ultralow-temperature heat-seal two-way stretching polypropylene film and preparation method thereof |
| CN105482260A (en) * | 2016-01-19 | 2016-04-13 | 凯威塑胶工业有限公司 | BOPP (biaxially-oriented polypropylene) bag making film for high and cold area and preparation method of BOPP bag making film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474935A (en) * | 2022-03-02 | 2022-05-13 | 安徽维龙新材料科技有限公司 | Multilayer co-extrusion BOPP (biaxially-oriented Polypropylene) film with ultrahigh tensile strength and preparation method thereof |
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Application publication date: 20211012 |