CN114274632A - BOPP film with low carbon dioxide emission and preparation method thereof - Google Patents
BOPP film with low carbon dioxide emission and preparation method thereof Download PDFInfo
- Publication number
- CN114274632A CN114274632A CN202111587082.0A CN202111587082A CN114274632A CN 114274632 A CN114274632 A CN 114274632A CN 202111587082 A CN202111587082 A CN 202111587082A CN 114274632 A CN114274632 A CN 114274632A
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- surface layer
- parts
- bopp film
- reducing agent
- 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.)
- Pending
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a BOPP film with low carbon dioxide emission and a preparation method thereof, wherein the BOPP film comprises an upper surface layer, a core layer and a lower surface layer which are sequentially arranged, and the upper surface layer and the lower surface layer comprise the following components in parts by weight: 91-98 parts of homopolymerized polypropylene, 1-5 parts of anti-blocking agent and 1-4 parts of carbon dioxide reducing agent master batch; the core layer comprises the following components in parts by weight: 90-98 parts of homopolymerized polypropylene, 0.5-3 parts of antistatic agent, 0.5-3 parts of slip agent and 1-4 parts of carbon dioxide reducing agent master batch; the carbon dioxide reducing agent in the carbon dioxide reducing agent master batch is a nano-scale carbonization catalyst liposome which is a spherical carrier preparation formed by encapsulating a carbonization catalyst in a monolayer phospholipid capsule. The BOPP film can reduce the emission of carbon dioxide when used as garbage for incineration in subsequent treatment on the basis of not reducing the original physical properties and keeping good appearance, and the preparation method does not need special production equipment, is simple to operate and has low cost.
Description
Technical Field
The invention belongs to the technical field of films, and particularly relates to a BOPP film with low carbon dioxide emission and a preparation method thereof.
Background
Biaxially oriented polypropylene film (BOPP for short) is an important soft plastic packaging material, has the advantages of low price, light weight, transparency, no toxicity, moisture resistance, low air permeability, high mechanical strength and the like, and is widely applied to packaging, printing and other industries.
However, the BOPP film has attracted much attention for processing after use, and the following processing is mainly divided into the following aspects: one part is recycled and reused, the other part is used as urban garbage for landfill, the other part is used for garbage incineration power generation, and the BOPP film incineration generates a large amount of carbon dioxide and water, so that environmental pollution and ecological damage are brought. Therefore, how to reduce the emission of carbon dioxide during the combustion of BOPP becomes an important development direction.
Disclosure of Invention
The invention aims to provide a BOPP film with low carbon dioxide emission, which can reduce 65% of carbon dioxide emission when the BOPP film is used for burning garbage in subsequent treatment on the basis of not reducing the original physical properties and keeping good appearance.
The technical scheme adopted by the invention for solving the problems is as follows: the BOPP film with low carbon dioxide emission comprises an upper surface layer, a core layer and a lower surface layer which are sequentially arranged, wherein the upper surface layer and the lower surface layer respectively comprise the following components in parts by weight:
91-98 parts of homopolymerized polypropylene
1-5 parts of anti-blocking agent
1-4 parts of carbon dioxide cutting agent master batch
The core layer comprises the following components in parts by weight:
90-98 parts of homopolymerized polypropylene
0.5-3 parts of antistatic agent
0.5-3 parts of slip agent
1-4 parts of carbon dioxide cutting agent master batch
The carrier of the carbon dioxide reducing agent master batch is a PP homopolymer, the effective component of the carbon dioxide reducing agent master batch is a carbon dioxide reducing agent, the carbon dioxide reducing agent is a carbonized catalyst liposome, the carbonized catalyst liposome is a spherical carrier preparation formed by encapsulating a carbonized catalyst in a monolayer phospholipid capsule, and the average particle size of the carbonized catalyst liposome is nano-scale.
Preferably, the carrier of the anti-blocking agent is PP homopolymer, the effective component is silicon dioxide, the concentration is 5w%, and the particle size is 4-7 μm.
Preferably, the concentration of the carbon dioxide reducing agent in the carbon dioxide reducing agent master batch is 5w%, and the carbon dioxide reducing agent is prepared by a supercritical reverse evaporation method.
Preferably, the carbonization catalyst is a dehydrogenation catalyst, and the carbonization catalyst comprises 9.0-35.6 wt% of potassium oxide, 1.8-8.0 wt% of magnesium oxide and the balance of iron oxide.
Preferably, the carrier of the antistatic agent is a PP homopolymer, the effective components are ethoxyamine and monoglyceride in a mass ratio of 1:1, and the concentration is 40 w%.
Preferably, the carrier of the slip agent is PP homopolymer, the effective component is macromolecular amine, and the concentration is 25 w%.
Preferably, the thickness of the upper surface layer is 1.0-1.5 μm, the thickness of the middle layer is 16-36 μm, and the thickness of the lower surface layer is 1.0-1.5 μm.
The invention also aims to provide a preparation method of the BOPP film with low carbon dioxide emission, which comprises the following steps:
(1) respectively premixing homo-polypropylene and carbon dioxide reducing agent master batches in the raw materials of the upper surface layer, the core layer and the lower surface layer, and then respectively mixing the uniformly mixed homo-polypropylene and carbon dioxide reducing agent master batches with an anti-bonding agent of the upper surface layer, an antistatic agent and a slip agent of the core layer and an anti-bonding agent of the lower surface layer to obtain a raw material of the upper surface layer, a raw material of the core layer and a raw material of the lower surface layer;
(2) respectively adding the upper surface layer raw material, the core layer raw material and the lower surface layer raw material into different extruders, separately feeding the materials in each layer, and performing melting plasticization to obtain an upper surface layer melt, a core layer melt and a lower surface layer melt;
(3) converging and extruding the upper surface layer melt, the core layer melt and the lower surface layer melt in a three-layer structure die head to obtain a membrane;
(4) the membrane is cooled by attaching a chilling roller and water bath to obtain a cast sheet;
(5) and (3) longitudinally stretching, transversely stretching, carrying out corona treatment on the cast sheet, and then rolling to obtain the BOPP film.
Preferably, the melt plasticizing temperature is: the feeding section is 210-240 ℃, the melting section is 245-255 ℃, and the metering section is 250-255 ℃.
Preferably, the longitudinal stretching ratio is 4.50-5.50, and the transverse stretching ratio is 8.0-10.0; in the longitudinal stretching process, the preheating temperature is 120-145 ℃, the stretching temperature is 110-135 ℃, and the setting temperature is 140-145 ℃; and in the transverse stretching process, the preheating temperature is 165-175 ℃, the stretching temperature is 150-160 ℃, and the setting temperature is 165-170 ℃.
Preferably, the temperature of the chilling roller is 22-27 ℃, and the temperature of the water bath is 20-25 ℃.
Compared with the prior art, the invention has the advantages that:
(1) the BOPP film with low carbon dioxide emission can reduce the carbon dioxide emission when used as garbage for incineration in subsequent treatment on the basis of meeting the current use performance, not reducing the original physical performance and keeping good appearance, and the preparation method does not need special production equipment, can be produced on the basis of the existing production process, has low cost and is convenient for rapid popularization.
(2) The carrier of the carbon dioxide reducing agent master batch is a PP homopolymer, the effective component is the carbon dioxide reducing agent, the carbon dioxide reducing agent is a nano-scale carbonized catalyst liposome prepared by adopting a supercritical reverse evaporation method, the carbonized catalyst is uniformly wrapped in a monolayer phospholipid capsule, the specific surface area is high, the carbonized catalyst can be effectively dispersed in a melt during melting and plasticizing, and the problems of reduction of the physical property of a film product, whitening and powdering on the surface and the like caused by the coagulation of the catalyst can be prevented due to the wrapping in the phospholipid membrane.
(3) The carbonization catalyst in the carbon dioxide cutting agent is a dehydrogenation catalyst, can promote the carbonization reaction of combustible gas during combustion, has shorter combustion time and can generate more carbides, thereby locking more carbon in residue ash and reducing the carbon emission in the air.
(4) In the preparation method of the BOPP film, the homopolymerized polypropylene and the carbon dioxide reducing agent in the raw materials of the upper surface layer, the core layer and the lower surface layer are respectively premixed, and then the uniformly mixed homopolymerized polypropylene and carbon dioxide reducing agent are respectively mixed with the anti-bonding agent of the upper surface layer, the antistatic agent and the slip agent of the core layer and the anti-bonding agent of the lower surface layer, so that the carbon dioxide reducing agent can be well dispersed into a film product; and the melting and plasticizing temperature in the melting extruder is limited to 210-240 ℃ in the feeding section, 245-255 ℃ in the melting section and 250-255 ℃ in the metering section, so that the effect of uniform plasticizing can be achieved, and the dispersibility is further improved.
(5) The invention selects homopolymer raw materials with good fluidity and uniform molecular weight distribution, and the cooling water temperature and the cooling roller temperature are controlled to be lower in the cast sheet forming process in the preparation process, the cooling water temperature is 20-25 ℃, and the cooling roller temperature is 22-27 ℃, thereby improving the crystallinity, ensuring the optical performance, and avoiding the influence on the processing process thickness uniformity and appearance optical performance of BOPP products due to the addition of a carbon dioxide cutting agent.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The BOPP film with low carbon dioxide emission comprises an upper surface layer, a core layer and a lower surface layer which are sequentially arranged, wherein the upper surface layer comprises the following components in parts by weight:
95 parts of homo-polypropylene
2 parts of anti-blocking agent
3 parts of carbon dioxide cutting agent master batch
The lower surface layer comprises the following components in parts by weight:
95 parts of homo-polypropylene
2 parts of anti-blocking agent
3 parts of carbon dioxide cutting agent master batch
The core layer comprises the following components in parts by weight:
95.5 parts of homopolymerized polypropylene
Antistatic agent 1 part
1.5 parts of slip agent
3 parts of carbon dioxide cutting agent master batch
The carrier of the carbon dioxide reducing agent master batch is a PP homopolymer, the effective component of the carbon dioxide reducing agent master batch is a carbon dioxide reducing agent with the concentration of 5w%, the carbon dioxide reducing agent is a carbonized catalyst liposome prepared by a supercritical reverse evaporation method, namely a nano-scale spherical carrier preparation formed by encapsulating a carbonized catalyst in a monolayer phospholipid capsule, the carbonized catalyst is a dehydrogenation catalyst, and the carbonized catalyst comprises 25% by weight of potassium oxide, 5% by weight of magnesium oxide and the balance of iron oxide.
The carrier of the anti-blocking agent is PP homopolymer, the effective component is silicon dioxide, the concentration is 5w%, and the particle size is 4-7 μm.
The carrier of the antistatic agent is PP homopolymer, the effective components are ethoxyamine and monoglyceride with the mass ratio of 1:1, and the concentration is 40 w%.
The carrier of the slip agent is PP homopolymer, the effective component is erucamide, and the concentration is 25 w%.
A preparation method of a BOPP film with low carbon dioxide emission comprises the following steps:
(1) respectively premixing homo-polypropylene and carbon dioxide reducing agent master batches in the raw materials of the upper surface layer, the core layer and the lower surface layer, and then respectively mixing the uniformly mixed homo-polypropylene and carbon dioxide reducing agent master batches with an anti-bonding agent of the upper surface layer, an antistatic agent and a slip agent of the core layer and an anti-bonding agent of the lower surface layer to obtain a raw material of the upper surface layer, a raw material of the core layer and a raw material of the lower surface layer;
(2) adding the upper surface raw material, the core layer raw material and the lower surface raw material into different extruders respectively, separately feeding and melting and plasticizing each layer to obtain an upper surface melt, a core layer melt and a lower surface melt, wherein the melting and plasticizing temperature is as follows: the feeding section is 220 ℃, the melting section is 250 ℃, and the metering section is 255 ℃;
(3) converging and extruding the upper surface layer melt, the core layer melt and the lower surface layer melt in a three-layer structure die head to obtain a membrane;
(4) the membrane is attached to a chill roll and cooled in water bath to obtain a cast sheet, wherein the temperature of the chill roll is 25 ℃, and the temperature of the water bath is 23 ℃;
(5) sequentially carrying out longitudinal stretching and transverse stretching on the cast sheet, wherein the longitudinal stretching ratio is 5.0, and the transverse stretching ratio is 9.0; in the longitudinal stretching process, the preheating temperature is 130 ℃, the stretching temperature is 125 ℃, and the setting temperature is 140 ℃; transverse stretching, wherein the preheating temperature is 165 ℃, the stretching temperature is 150 ℃, and the shaping temperature is 165 ℃;
(6) and sequentially carrying out corona treatment, air cooling treatment, online measurement, rim charge cutting, static elimination, automatic winding and aging treatment on the stretched BOPP film to obtain a finished product BOPP film.
The BOPP film produced according to the raw material formula and the preparation method has the upper surface layer with the thickness of 1 mu m, the middle layer with the thickness of 20 mu m and the lower surface layer with the thickness of 1 mu m.
Example 2
The BOPP film with low carbon dioxide emission comprises an upper surface layer, a core layer and a lower surface layer which are sequentially arranged, wherein the upper surface layer comprises the following components in parts by weight:
95 parts of homo-polypropylene
3 parts of anti-blocking agent
2 parts of carbon dioxide cutting agent master batch
The lower surface layer comprises the following components in parts by weight:
95 parts of homo-polypropylene
3 parts of anti-blocking agent
2 parts of carbon dioxide cutting agent master batch
The core layer comprises the following components in parts by weight:
95.5 parts of homopolymerized polypropylene
Antistatic agent 2 parts
1.5 parts of slip agent
2 parts of carbon dioxide cutting agent master batch
The carrier of the carbon dioxide reducing agent master batch is a PP homopolymer, the effective component of the carbon dioxide reducing agent master batch is a carbon dioxide reducing agent with the concentration of 5w%, the carbon dioxide reducing agent is a carbonized catalyst liposome prepared by a supercritical reverse evaporation method, namely a spherical carrier preparation formed by encapsulating a carbonized catalyst in a monolayer phospholipid capsule, and the average particle size of the carbonized catalyst liposome is nano. The carbonization catalyst is a dehydrogenation catalyst, and comprises 20 wt% of potassium oxide, 6 wt% of magnesium oxide and the balance of iron oxide.
The carrier of the anti-blocking agent is PP homopolymer, the effective component is silicon dioxide, the concentration is 5w%, and the particle size is 4-7 μm.
The carrier of the antistatic agent is PP homopolymer, the effective components are ethoxyamine and monoglyceride with the mass ratio of 1:1, and the concentration is 40 w%.
The carrier of the slip agent is PP homopolymer, the effective component is erucamide, and the concentration is 25 w%.
A preparation method of a BOPP film with low carbon dioxide emission comprises the following steps:
(1) respectively premixing homo-polypropylene and carbon dioxide reducing agent master batches in the raw materials of the upper surface layer, the core layer and the lower surface layer, and then respectively mixing the uniformly mixed homo-polypropylene and carbon dioxide reducing agent master batches with an anti-bonding agent of the upper surface layer, an antistatic agent and a slip agent of the core layer and an anti-bonding agent of the lower surface layer to obtain a raw material of the upper surface layer, a raw material of the core layer and a raw material of the lower surface layer;
(2) adding the upper surface raw material, the core layer raw material and the lower surface raw material into different extruders respectively, separately feeding and melting and plasticizing each layer to obtain an upper surface melt, a core layer melt and a lower surface melt, wherein the melting and plasticizing temperature is as follows: the feeding section is 220 ℃, the melting section is 245 ℃, and the metering section is 250 ℃;
(3) converging and extruding the upper surface layer melt, the core layer melt and the lower surface layer melt in a three-layer structure die head to obtain a membrane;
(4) the membrane is attached to a chill roll and cooled in water bath to obtain a cast sheet, wherein the temperature of the chill roll is 22 ℃, and the temperature of the water bath is 21 ℃;
(5) the cast sheet is sequentially subjected to longitudinal stretching and transverse stretching, wherein the longitudinal stretching ratio is 4.50, and the transverse stretching ratio is 8.0; in the longitudinal stretching process, the preheating temperature is 125 ℃, the stretching temperature is 120 ℃, and the setting temperature is 140 ℃; transverse stretching, wherein the preheating temperature is 165 ℃, the stretching temperature is 160 ℃, and the setting temperature is 170 ℃;
(6) and sequentially carrying out corona treatment, air cooling treatment, online measurement, rim charge cutting, static elimination, automatic winding and aging treatment on the stretched BOPP film to obtain a finished product BOPP film.
The BOPP film produced according to the raw material formula and the preparation method has the upper surface layer with the thickness of 1 mu m, the middle layer with the thickness of 20 mu m and the lower surface layer with the thickness of 1 mu m.
Comparative example 1
The difference from example 1 is that: does not contain a carbon dioxide reducer masterbatch.
Comparative example 2
The difference from example 1 is that: in the preparation method, the raw materials of the components of the upper surface layer, the core layer and the lower surface layer are respectively added into different extruders, namely, no premixing step is needed.
Comparative example 3
The difference from example 1 is that: the chill roll temperature was 32 ℃ and the water bath temperature was 32 ℃.
The results of the performance test of the BOPP films of the examples and comparative examples are shown in table 1:
in addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a BOPP film of low carbon dioxide emission, includes upper epidermis, sandwich layer, the lower epidermis that sets gradually, its characterized in that: the upper surface layer and the lower surface layer respectively comprise the following components in parts by weight:
91-98 parts of homopolymerized polypropylene
1-5 parts of anti-blocking agent
1-4 parts of carbon dioxide cutting agent master batch
The core layer comprises the following components in parts by weight:
90-98 parts of homopolymerized polypropylene
0.5-3 parts of antistatic agent
0.5-3 parts of slip agent
1-4 parts of carbon dioxide cutting agent master batch
The carrier of the carbon dioxide reducing agent master batch is a PP homopolymer, the effective component of the carbon dioxide reducing agent master batch is a carbon dioxide reducing agent, the carbon dioxide reducing agent is a carbonized catalyst liposome, the carbonized catalyst liposome is a spherical carrier preparation formed by encapsulating a carbonized catalyst in a monolayer phospholipid capsule, and the average particle size of the carbonized catalyst liposome is nano-scale.
2. The low carbon dioxide emission BOPP film according to claim 1, wherein: the carrier of the anti-blocking agent is PP homopolymer, the effective component is silicon dioxide, the concentration is 5w%, and the particle size is 4-7 μm.
3. The low carbon dioxide emission BOPP film according to claim 1, wherein: the concentration of the carbon dioxide reducing agent in the carbon dioxide reducing agent master batch is 5w%, and the carbon dioxide reducing agent is prepared by a supercritical reverse evaporation method.
4. The low carbon dioxide emission BOPP film according to claim 1, wherein: the carrier of the antistatic agent is a PP homopolymer, the effective components are ethoxyamine and monoglyceride, and the concentration is 40 w%.
5. The low carbon dioxide emission BOPP film according to claim 1, wherein: the carrier of the slip agent is PP homopolymer, the effective component is macromolecular amine, and the concentration is 25 w%.
6. The low carbon dioxide emission BOPP film according to claim 1, wherein: the thickness of the upper surface layer is 1.0-1.5 mu m, the thickness of the middle layer is 16-36 mu m, and the thickness of the lower surface layer is 1.0-1.5 mu m.
7. A method for preparing a BOPP film with low carbon dioxide emission according to any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps:
(1) respectively premixing homo-polypropylene and carbon dioxide reducing agent master batches in the raw materials of the upper surface layer, the core layer and the lower surface layer, and then respectively mixing the uniformly mixed homo-polypropylene and carbon dioxide reducing agent master batches with an anti-bonding agent of the upper surface layer, an antistatic agent and a slip agent of the core layer and an anti-bonding agent of the lower surface layer to obtain a raw material of the upper surface layer, a raw material of the core layer and a raw material of the lower surface layer;
(2) respectively adding the upper surface layer raw material, the core layer raw material and the lower surface layer raw material into different extruders, separately feeding the materials in each layer, and performing melting plasticization to obtain an upper surface layer melt, a core layer melt and a lower surface layer melt;
(3) converging and extruding the upper surface layer melt, the core layer melt and the lower surface layer melt in a three-layer structure die head to obtain a membrane;
(4) the membrane is cooled by attaching a chilling roller and water bath to obtain a cast sheet;
(5) and (3) longitudinally stretching, transversely stretching, carrying out corona treatment on the cast sheet, and then rolling to obtain the BOPP film.
8. The method for preparing a BOPP film with low carbon dioxide emission according to claim 7, wherein the method comprises the following steps: the melting and plasticizing temperatures are as follows: the feeding section is 210-240 ℃, the melting section is 245-255 ℃, and the metering section is 250-255 ℃.
9. The method for preparing a BOPP film with low carbon dioxide emission according to claim 7, wherein the method comprises the following steps: the longitudinal stretching ratio is 4.50-5.50, and the transverse stretching ratio is 8.0-10.0; in the longitudinal stretching process, the preheating temperature is 120-145 ℃, the stretching temperature is 110-135 ℃, and the setting temperature is 140-145 ℃; and in the transverse stretching process, the preheating temperature is 165-175 ℃, the stretching temperature is 150-160 ℃, and the setting temperature is 165-170 ℃.
10. The method for preparing a BOPP film with low carbon dioxide emission according to claim 7, wherein the method comprises the following steps: the temperature of the chilling roller is 22-27 ℃, and the temperature of the water bath is 20-25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587082.0A CN114274632A (en) | 2021-12-23 | 2021-12-23 | BOPP film with low carbon dioxide emission and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587082.0A CN114274632A (en) | 2021-12-23 | 2021-12-23 | BOPP film with low carbon dioxide emission and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114274632A true CN114274632A (en) | 2022-04-05 |
Family
ID=80874370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111587082.0A Pending CN114274632A (en) | 2021-12-23 | 2021-12-23 | BOPP film with low carbon dioxide emission and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114274632A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007107138A (en) * | 2005-10-14 | 2007-04-26 | Masamitsu Nagahama | Fiber resin product, method for producing the same and use of granular material |
| CN105172284A (en) * | 2015-07-30 | 2015-12-23 | 中山火炬职业技术学院 | BOPP film with endurable and smoothness characteristics and preparation method therefor |
| CN105500889A (en) * | 2016-01-28 | 2016-04-20 | 海宁长昆包装有限公司 | Manufacturing process of three-layer co-extrusion nano-modified BOPP matt film |
| JP2021017661A (en) * | 2019-07-17 | 2021-02-15 | 井上染工株式会社 | Manufacturing method of yarns involving co2 reduction agent |
-
2021
- 2021-12-23 CN CN202111587082.0A patent/CN114274632A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007107138A (en) * | 2005-10-14 | 2007-04-26 | Masamitsu Nagahama | Fiber resin product, method for producing the same and use of granular material |
| CN105172284A (en) * | 2015-07-30 | 2015-12-23 | 中山火炬职业技术学院 | BOPP film with endurable and smoothness characteristics and preparation method therefor |
| CN105500889A (en) * | 2016-01-28 | 2016-04-20 | 海宁长昆包装有限公司 | Manufacturing process of three-layer co-extrusion nano-modified BOPP matt film |
| JP2021017661A (en) * | 2019-07-17 | 2021-02-15 | 井上染工株式会社 | Manufacturing method of yarns involving co2 reduction agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109720055B (en) | Polyvinyl alcohol/polylactic acid composite film and preparation method thereof | |
| CN109720066B (en) | Polyvinyl alcohol/polypropylene composite film and preparation method thereof | |
| KR101268217B1 (en) | Thermo-shrinkable polyester mono-layer film | |
| CN115044126B (en) | Anti-sticking master batch for BOPE film and preparation method and application thereof | |
| CN112644123A (en) | Toughened biaxially-oriented polylactic acid film and preparation method thereof | |
| CN108232090A (en) | Mixed raw material and its application of lithium ion secondary battery membrane are prepared again | |
| CN109278389B (en) | Coating-free biaxially oriented polypropylene cold seal base film and preparation method thereof | |
| CN110936687A (en) | Low-glossiness anaerobic biodegradable biaxially oriented polypropylene film | |
| CN114274632A (en) | BOPP film with low carbon dioxide emission and preparation method thereof | |
| CN113895126A (en) | High-shrinkage biaxially-oriented polylactic acid film and preparation method thereof | |
| CN106739331A (en) | PO films for the filling film of emulsion and preparation method thereof | |
| CN111748122B (en) | Expandable biodegradable particles and high-foaming-rate biodegradable expanded beads with antistatic function | |
| CN107160749A (en) | A kind of colored ventilated membrane and its production technology and application | |
| CN112936899B (en) | Production method of multifunctional high-haze transfer film | |
| CN112194834A (en) | High-temperature-shrinkage-resistant polyethylene foamed sheet and preparation method thereof | |
| CN109280273B (en) | High melt strength polypropylene film compositions and films and uses thereof | |
| CN112078209A (en) | Oxidizable biodegradable cross-linked polyolefin heat shrinkable film | |
| CN111152530A (en) | Degradable high-strength tensile film and preparation method thereof | |
| CN110406223B (en) | Degradable environment-friendly polyolefin heat shrinkable film and preparation method thereof | |
| CN105176011A (en) | Method for making polyester film for ultrathin aluminum plating compounding | |
| CN112644121A (en) | BOPP semi-dull transfer film and preparation method thereof | |
| CN111978623A (en) | Preparation method of winding film and winding film prepared by preparation method | |
| CN109517372B (en) | Extinction nylon film and preparation method thereof | |
| CN106142785B (en) | A kind of dry plate composite bidirectional stretching polyester film and preparation method thereof | |
| CN111716850A (en) | Superstrong antistatic smooth cigarette film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |