CN102173160A - Heavy-duty thermal shrinkage polyethylene film and preparation method thereof - Google Patents

Heavy-duty thermal shrinkage polyethylene film and preparation method thereof Download PDF

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Publication number
CN102173160A
CN102173160A CN2010106119800A CN201010611980A CN102173160A CN 102173160 A CN102173160 A CN 102173160A CN 2010106119800 A CN2010106119800 A CN 2010106119800A CN 201010611980 A CN201010611980 A CN 201010611980A CN 102173160 A CN102173160 A CN 102173160A
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polyethylene
heat shrink
density polyethylene
shrink films
10min
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CN102173160B (en
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黄镇荣
黄卫东
罗振华
全明德
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DONGGUAN CITY ZHENGXIN PACKING PRODUCTS Co Ltd
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DONGGUAN CITY ZHENGXIN PACKING PRODUCTS Co Ltd
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Abstract

The invention belongs to technical field of packaging films, particularly relating to a heavy-duty thermal shrinkage polyethylene film and a preparation method thereof. The thickness of the thermal shrinkage film is 50-70 mu m, and prepared from three layers of films, namely, an inner layer, a middle layer and an outer layer though coextrusion bonding; the ratio of the thickness of the outer layer to the thickness of the middle layer to the thickness of the inner layer is 1:(2.5-3.5):1; the raw materials of the outer layer comprise metallocene polyethylene, low-density polyethylene and high-density polyethylene at a mass ratio of (3-4):2:2; the raw materials of the middle layer comprise metallocene polyethylene, low-density polyethylene and high-density polyethylene at a mass ratio of 2:(1-1.5):(3-4); and the raw materials of the inner layer are same as those of the outer layer. The thermal shrinkage polyethylene film and preparation method thereof disclosed by the invention have the advantages that on the basis of maintaining good physical and mechanical properties such as thermal shrinkage, tearing strength, tensile strength at break, elongation at break, impulse strength and the like, 20-30% of materials are saved, thereby effectively reducing the cost.

Description

A kind of polyethylene is heavily packed heat shrink films and preparation method thereof
Technical field
The invention belongs to the packing film technical field, be specifically related to a kind of polyethylene and heavily pack heat shrink films and preparation method thereof.
Background technology
Heat shrink films is a kind of orientation that is stretched in process of production, and the thermoplastic film who in use is subjected to thermal contraction.The heat-shrinkable of film just obtained as far back as 1936 to use, and mainly took the putrefactive food of shrink wrapping with rubber film at first.Nowadays, heat shrinkage techniques has developed into almost can pack extensive stock with heat shrink films, as food, medicine, the sterilization tableware, stationery sports goods, process gift, printed matter, the five metals plastic products, telephone set, the external packing of the various products of electronic apparatus or the like, especially aspect combined type (boundling) packing of anomalistic object article or commodity, the protection against the tide that can satisfy commodity is dustproof, touch-proof, functions such as transparent display, can increase the product appearance attraction again, also can be used for replacing all kinds of cartons, not only save packing cost, and meeting the packing trend, these products all bring great convenience to people's life.
Because heat shrink films is mainly used in the sale and the transportation of various products, its mainly act on is firm, hide and the protection product, so heat shrink films must have higher paracentesis resistance, good shrinkage and shrinkage stress.Initial heat shrink films is based on PVC, and along with to the improving constantly of heat shrink films performance requirement, the PVC heat shrink films reduces gradually, and the multi-layer co-extruded heat shrinkage film development of various polythene PE rapidly.Along with the development of technology, each enterprise makes every effort to further reduce the raw material consumption, reduce cost on the basis of satisfying the good physics of heat shrink films, mechanical performance.
Summary of the invention
The purpose of this invention is to provide a kind of physical and mechanical properties well and the polyethylene that can reduce the raw material use amount heavily pack heat shrink films.
The object of the present invention is achieved like this: a kind of polyethylene is heavily packed heat shrink films, and the thickness of this heat shrink films is 50-70um, is made of the film of three-layer co-extruded bonding, promptly outer, intermediate layer and skin.
Wherein, described outer field thickness: the thickness in intermediate layer: the thickness of internal layer is 1:(2.5-3.5): 1.
Wherein, described outer field raw material comprises that mass ratio is metallocene PE, low density polyethylene (LDPE) and the high density polyethylene (HDPE) of (3-4): 2:2.
Wherein, the raw material in described intermediate layer comprises that mass ratio is 2:(1-1.5): metallocene PE (3-4), low density polyethylene (LDPE) and high density polyethylene (HDPE).
Wherein, the raw material of described internal layer comprises that mass ratio is metallocene PE, low density polyethylene (LDPE) and the high density polyethylene (HDPE) of (3-4): 2:2.
Wherein, described metallocene PE MPE is that melt index is that 0.3-0.5g/10min, density are 0.927-0.944g/cm 3Metallocene PE MPE 1 and melt index 0.8-1.0g/10min, 0.917-0.925g/ cm 3Metallocene PE MPE 2 in one or both press arbitrary proportion and mix.
Wherein, described low density polyethylene (LDPE) is that melt index is that 0.3-0.8g/10min, density are 0.918-0.922g/cm 3Low density polyethylene.
Wherein, described high density polyethylene (HDPE) is that melt index is that 0.1-0.7g/10min, density are 0.95-0.96g/ cm 3High density polyethylene.
Preferably, described skin comprises the fluorine-containing polymer processing aids that accounts for outer gross weight 0.5-2.5%; Described intermediate layer comprises the fluorine-containing polymer processing aids that accounts for intermediate layer gross weight 0.5-2.5%; Described internal layer comprises the fluorine-containing polymer processing aids that accounts for internal layer gross weight 0.5-2.5%.
Preferably, described skin comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive; Described intermediate layer comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive; Described internal layer comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive.Described fire retardant, antioxidant, light stabilizer and antistatic additive are the plastic processing usual auxiliaries, can add selectively as required.
A kind of polyethylene is heavily packed the preparation method of heat shrink films: will extrude by three-layer co-extruded equipment after each layer raw material mixing and stirring.
Beneficial effect of the present invention is: the present invention saves material 20-30% on the basis of physical and mechanical properties such as the good percent thermal shrinkage of maintenance, tearing strength, fracture tensile strength, elongation at break, impact strength, effectively reduce cost; Glossiness height of the present invention can make printed patterns more attractive in appearance and clear when being used to print; Chucking power height of the present invention, good, the anti-puncture of deflection, no broken hole make packing firmer, are beneficial to transportation and stacking.
The specific embodiment
The invention will be further described below by embodiment, but practical range of the present invention is not limited to this.
Embodiment 1
A kind of polyethylene is heavily packed heat shrink films, and this heat shrink films comprises that the film of skin, intermediate layer and the three-layer co-extruded bonding of internal layer constitutes.
Described outer the employing:
The 1Kg melt index is that 0.3g/10min, density are 0.927g/cm 3MPE 1,
2Kg melt index 0.8g/10min, 0.917g/ cm 3MPE 2,
The 2Kg melt index is that 0.3g/10min, density are 0.918 g/cm 3LDPE,
The 2Kg melt index is that 0.1g/10min, density are 0.95g/ cm 3HDPE.
Adopt in described intermediate layer:
2.5Kg melt index is 0.3g/10min, density is 0.927g/cm 3MPE 1,
2.5Kg melt index 0.8g/10min, 0.917g/ cm 3MPE 2,
2.5Kg melt index is 0.3g/10min, density is 0.918g/cm 3LDPE
7.5Kg melt index is 0.1g/10min, density is 0.95g/ cm 3HDPE.
Described internal layer adopts and outer identical raw material and identical weight.
Above raw material is produced according to the common process of three-layer co-extruded equipment, promptly got a kind of polyethylene and heavily pack heat shrink films.
The heat shrink films thickness 70 μ m(that present embodiment makes wherein, outer 14 μ m, intermediate layer 42 μ m, internal layer 14 μ m), mist degree 7%, glossiness (45 °) 125%, fall to marking impact strength 190g, Elmendorf tear strength (MD/TD) 480/1500 N/cm, fracture tensile strength (MD/TD) 44/47Mpa, elongation at break (MD/TD) 480/760%, percent thermal shrinkage (130 ℃ * 20 seconds MD/TD) 71/22%.
Embodiment 2
A kind of polyethylene is heavily packed heat shrink films, and this heat shrink films comprises that the film of skin, intermediate layer and the three-layer co-extruded bonding of internal layer constitutes.
Described outer the employing:
The 1Kg melt index is that 0.4g/10min, density are 0.934g/cm 3MPE 1,
3Kg melt index 0.9g/10min, 0.921g/ cm 3MPE 2,
The 2Kg melt index is that 0.5g/10min, density are 0.921 g/cm 3LDPE,
The 2Kg melt index is that 0.3g/10min, density are 0.96g/ cm 3HDPE;
0.08kg the polymer processing aids that the Tai Lema board is fluorine-containing.
Adopt in described intermediate layer:
The 1Kg melt index is that 0.4g/10min, density are 0.934g/cm 3MPE 1,
3Kg melt index 0.9g/10min, 0.921g/ cm 3MPE 2,
The 3Kg melt index is that 0.5g/10min, density are 0.921 g/cm 3LDPE,
The 8Kg melt index is that 0.3g/10min, density are 0.96g/ cm 3HDPE;
0.15kg the polymer processing aids that the Tai Lema board is fluorine-containing.
Described internal layer adopts and outer identical raw material and identical weight.
Above raw material is produced according to the common process of three-layer co-extruded equipment, promptly got a kind of polyethylene and heavily pack heat shrink films.
The heat shrink films thickness 55 μ m(that present embodiment makes wherein, outer 10 μ m, intermediate layer 35 μ m, internal layer 10 μ m), mist degree 8%, glossiness (45 °) 122%, fall to marking impact strength 280g, Elmendorf tear strength (MD/TD) 455/1520 N/cm, fracture tensile strength (MD/TD) 43/45Mpa, elongation at break (MD/TD) 480/750%, percent thermal shrinkage (130 ℃ * 20 seconds MD/TD) 72/21%.
Embodiment 3
A kind of polyethylene is heavily packed heat shrink films, and this heat shrink films comprises that the film of skin, intermediate layer and the three-layer co-extruded bonding of internal layer constitutes.
Described outer the employing:
1.5Kg melt index is 0.5g/10min, density is 0.944g/cm 3MPE 1,
2.5Kg melt index 1.0g/10min, 0.925g/ cm 3MPE 2,
The 2Kg melt index is that 0.8g/10min, density are 0.922g/cm 3LDPE,
The 2Kg melt index is that 0.7g/10min, density are 0.96g/ cm 3HDPE;
0.05kg magnesium hydroxide inorganic combustion inhibitor.
Adopt in described intermediate layer:
The 3Kg melt index is that 0.5g/10min, density are 0.944g/cm 3MPE 1,
3Kg melt index 1.0g/10min, 0.925g/ cm 3MPE 2,
4.5Kg melt index is 0.8g/10min, density is 0.922g/cm 3LDPE,
7. the 5Kg melt index is that 0.7g/10min, density are 0.96g/ cm 3HDPE;
0.05kg magnesium hydroxide inorganic combustion inhibitor.
Described internal layer adopts and outer identical raw material and identical weight.
Above raw material is produced according to the common process of three-layer co-extruded equipment, promptly got a kind of polyethylene and heavily pack heat shrink films.
The heat shrink films thickness 63 μ m(that present embodiment makes wherein, outer 14 μ m, intermediate layer 35 μ m, internal layer 14 μ m), mist degree 10%, glossiness (45 °) 119%, fall to marking impact strength 230g, Elmendorf tear strength (MD/TD) 455/1450N/cm, fracture tensile strength (MD/TD) 43/45Mpa, elongation at break (MD/TD) 420/730%, percent thermal shrinkage (130 ℃ * 20 seconds MD/TD) 72/21%.
Embodiment 4
A kind of polyethylene is heavily packed heat shrink films, and this heat shrink films comprises that the film of skin, intermediate layer and the three-layer co-extruded bonding of internal layer constitutes.
Described outer the employing:
The 4Kg melt index is that 0.3g/10min, density are 0.944g/cm 3MPE 1,
The 2Kg melt index is that 0.8g/10min, density are 0.918 g/cm 3LDPE,
The 2Kg melt index is that 0.7g/10min, density are 0.95g/ cm 3HDPE;
0.04Kg titanium dioxide light stabilizer.
Adopt in described intermediate layer:
The 6Kg melt index is that 0.3g/10min, density are 0.944g/cm 3MPE 1,
The 3Kg melt index is that 0.8g/10min, density are 0.918 g/cm 3LDPE,
The 12Kg melt index is that 0.7g/10min, density are 0.95g/ cm 3HDPE;
0.04Kg titanium dioxide light stabilizer.
Described internal layer adopts and outer identical raw material and identical weight.
Above raw material is produced according to the common process of three-layer co-extruded equipment, promptly got a kind of polyethylene and heavily pack heat shrink films.
The heat shrink films thickness 65 μ m(that present embodiment makes wherein, outer 13 μ m, intermediate layer 39 μ m, internal layer 13 μ m), mist degree 10%, glossiness (45 °) 128%, fall to marking impact strength 290g, Elmendorf tear strength (MD/TD) 520/1580 N/cm, fracture tensile strength (MD/TD) 43/45Mpa, elongation at break (MD/TD) 490/780%, percent thermal shrinkage (130 ℃ * 20 seconds MD/TD) 72/21%.
Embodiment 5
A kind of polyethylene is heavily packed heat shrink films, and this heat shrink films comprises that the film of skin, intermediate layer and outer three layers of extrusion blow-molded bonding constitutes;
Described outer the employing:
3Kg melt index 1.0g/10min, 0.925g/ cm 3MPE 2,
The 2Kg melt index is that 0.8g/10min, density are 0.922 g/cm 3LDPE,
The 2Kg melt index is that 0.7g/10min, density are 0.96g/ cm 3HDPE;
0.18kg the polymer processing aids that the Tai Lema board is fluorine-containing.
Adopt in described intermediate layer:
The 2Kg melt index is that 0.5g/10min, density are 0.944g/cm 3MPE 1,
2Kg melt index 1.0g/10min, 0.925g/ cm 3MPE 2,
The 3Kg melt index is that 0.8g/10min, density are 0.922 g/cm 3LDPE
The 8Kg melt index is that 0.7g/10min, density are 0.96g/ cm 3HDPE;
0.38kg the polymer processing aids that the Tai Lema board is fluorine-containing.
Described internal layer adopts and outer identical raw material and identical weight.
Above raw material is produced according to the common process of three-layer co-extruded equipment, promptly got a kind of polyethylene and heavily pack heat shrink films.
The heat shrink films thickness 50 μ m(that present embodiment makes wherein, outer 10 μ m, intermediate layer 30 μ m, internal layer 10 μ m), mist degree 6%, glossiness (45 °) 119%, fall to marking impact strength 230g, Elmendorf tear strength (MD/TD) 455/1450 N/cm, fracture tensile strength (MD/TD) 45/49Mpa, elongation at break (MD/TD) 420/730%, percent thermal shrinkage (130 ℃ * 20 seconds MD/TD) 75/22%.
Table 1 is the rerum natura contrast table of the present invention and ordinary hot shrink film.
Table 1
The rerum natura contrast table Unit The ordinary hot shrink film Heat shrink films of the present invention
Thickness μm 80～100 50～70
Mist degree ％ 17～27 6～10
45 ° of glossiness ％ 60～30 128～119
Fall to marking impact strength g / 180～290
Elmendorf tear strength (MD/TD) N/cm 395～435/860～865 455～520/1440～1580
Fracture tensile strength (MD/TD) Mpa 25～29/28～32 43～45/45～49
Elongation at break (MD/TD) ％ 310～400/580～670 390～500/730～790
Percent thermal shrinkage (130 ℃ * 20 seconds) MD ％ ＞70 ＞70
Percent thermal shrinkage (130 ℃ * 20 seconds) TD ％ ＞20 ＞20
Contrast by table 1 is as can be seen: the thickness of heat shrink films of the present invention significantly reduces than the thickness of ordinary hot shrink film, but percent thermal shrinkage is still suitable with the ordinary hot shrink film, and tearing strength, fracture tensile strength, elongation at break, impact strength, glossiness and mist degree obviously are better than the ordinary hot shrink film.
The above only is a better embodiment of the present invention, so all equivalences of doing according to the described structure of patent claim of the present invention, feature and principle change or modify, is included in the patent claim of the present invention.

Claims (7)

1. a polyethylene is heavily packed heat shrink films, it is characterized in that: the thickness of this heat shrink films is 50-70 μ m, is made of the film of three-layer co-extruded bonding, promptly outer, intermediate layer and internal layer;
Described outer field thickness: the thickness in intermediate layer: the thickness of internal layer is 1:(2.5-3.5): 1;
Described outer field raw material comprises that mass ratio is metallocene PE, low density polyethylene (LDPE) and the high density polyethylene (HDPE) of (3-4): 2:2;
The raw material in described intermediate layer comprises that mass ratio is 2:(1-1.5): metallocene PE (3-4), low density polyethylene (LDPE) and high density polyethylene (HDPE);
The raw material of described internal layer comprises that mass ratio is metallocene PE, low density polyethylene (LDPE) and the high density polyethylene (HDPE) of (3-4): 2:2.
2. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: described metallocene PE is that melt index is that 0.3-0.5g/10min, density are 0.927-0.944g/cm 3Metallocene PE MPE 1 and melt index 0.8-1.0g/10min, 0.917-0.925g/ cm 3Metallocene PE MPE 2 in one or both press arbitrary proportion and mix.
3. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: described low density polyethylene (LDPE) is that melt index is 0.3-0.8g/10min, and density is 0.918-0.922g/cm 3Low density polyethylene (LDPE).
4. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: described high density polyethylene (HDPE) is that melt index is that 0.1-0.7g/10min, density are 0.95-0.96g/ cm 3High density polyethylene (HDPE).
5. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: described skin comprises the fluorine-containing polymer processing aids that accounts for outer gross weight 0.5-2.5%; Described intermediate layer comprises the fluorine-containing polymer processing aids that accounts for intermediate layer gross weight 0.5-2.5%; Described internal layer comprises the fluorine-containing polymer processing aids that accounts for internal layer gross weight 0.5-2.5%.
6. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: described skin comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive; Described intermediate layer comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive; Described internal layer comprises a kind of or several arbitrarily in fire retardant, antioxidant, light stabilizer and the antistatic additive.
7. a kind of polyethylene according to claim 1 is heavily packed heat shrink films, it is characterized in that: its preparation method is to extrude by three-layer co-extruded equipment after each layer raw material mixing and stirring.
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CN103264553B (en) * 2013-04-28 2015-07-01 无锡市方成彩印包装有限公司 Shrink package color film and production method thereof
CN103264553A (en) * 2013-04-28 2013-08-28 无锡市方成彩印包装有限公司 Shrink package color film and production method thereof
CN103274113A (en) * 2013-06-06 2013-09-04 福清旭泳塑胶有限公司 Anti-static traceless grease-free dustproof buffering packing bag and manufacturing process thereof
CN103274113B (en) * 2013-06-06 2015-08-26 福清旭泳塑胶有限公司 Electrostatic prevention is seamless without the packaging bag of grease dustproof buffered and manufacture craft thereof
CN103481621B (en) * 2013-08-30 2015-10-28 东莞市正新包装制品有限公司 A kind of low-temperature polyethylene shrink film and film-blowing process thereof
CN104416987A (en) * 2013-08-30 2015-03-18 东莞市正新包装制品有限公司 Low-thickness polyethylene heat shrinkable film
CN103481621A (en) * 2013-08-30 2014-01-01 东莞市正新包装制品有限公司 Low-temperature polyethylene shrink film and film blowing technique thereof
CN103818083A (en) * 2014-02-17 2014-05-28 上海福助工业有限公司 Pure PE three-layer plastic film, corner angle packaging bag prepared therefrom, and production method of the film
CN103818083B (en) * 2014-02-17 2016-06-01 上海福助工业有限公司 Pure PE three-layer plastic film, corner angle packing bag prepared therefrom and production method thereof
CN104260518A (en) * 2014-10-17 2015-01-07 罗瑞尔工业薄膜（昆山）有限公司 Flame-retardant polyethylene film
CN105619745B (en) * 2014-11-07 2017-12-26 上海海湾石化有限公司 The preparation method of the three-layer co-extruded multilayer packing membranes of FFS
CN105619745A (en) * 2014-11-07 2016-06-01 上海海湾石化有限公司 Preparation method of FFS (Form-Fill-Seal) three-layer co-extrusion heavy packaging film
CN104608443A (en) * 2014-11-26 2015-05-13 界首市天鸿包装材料有限公司 Processing technology for heat shrinkable film
CN104960300A (en) * 2015-06-05 2015-10-07 无锡市方成彩印包装有限公司 Tetra Pak thin transparent external-packaging shrink film and production method thereof
CN104960765A (en) * 2015-06-05 2015-10-07 无锡市方成彩印包装有限公司 Thin transparent external packaging shrink film of ring-pull can and production method
CN105216412A (en) * 2015-10-16 2016-01-06 无锡市方成彩印包装有限公司 A kind of article packaging thermal contraction packaging film and production method thereof
CN105459549A (en) * 2015-12-29 2016-04-06 东莞市正新包装制品有限公司 PE heat shrink film
CN105459549B (en) * 2015-12-29 2018-05-04 东莞市正新包装制品有限公司 A kind of PE heat shrink films
CN105965999A (en) * 2016-05-05 2016-09-28 永新股份（黄山）包装有限公司 Composite film for milk powder package
CN105965999B (en) * 2016-05-05 2018-02-06 永新股份（黄山）包装有限公司 A kind of milk powder composite packing film
CN106750823A (en) * 2017-01-19 2017-05-31 安徽致达包装有限公司 A kind of PE heat-shrinkable films and its production technology
CN107141553A (en) * 2017-05-22 2017-09-08 安徽致达包装有限公司 One kind punching PE heat-shrinkable films
CN107225830A (en) * 2017-06-23 2017-10-03 江南大学 A kind of slim heavy packaging low temperature heat shrink films and preparation method thereof
CN107244121A (en) * 2017-06-23 2017-10-13 无锡市方成彩印包装有限公司 A kind of high strength slim packs heat shrink films and preparation method thereof again
CN107225830B (en) * 2017-06-23 2019-03-26 江南大学 Slim heavy packaging low temperature heat shrink films of one kind and preparation method thereof
CN107244121B (en) * 2017-06-23 2019-03-12 无锡市方成彩印包装有限公司 A kind of high strength slim packs heat shrink films and preparation method thereof again
CN107498965A (en) * 2017-07-07 2017-12-22 河间市精诚塑业有限公司 A kind of super-thin low-voltage thermoplastic film and its preparation technology
CN107498965B (en) * 2017-07-07 2019-03-12 河间市精诚塑业有限公司 A kind of super-thin low-voltage thermoplastic film and its preparation process
CN107364212A (en) * 2017-07-25 2017-11-21 浙江比例包装股份有限公司 Uvioresistant pallet-free is packed for counterdie
CN109383097A (en) * 2017-08-07 2019-02-26 海口未来技术研究院 Polyethylene film and aerostatics
CN108659726A (en) * 2018-04-19 2018-10-16 广东东立新材料科技股份有限公司 A kind of height for CNC cuttings glues PE protective films and preparation method thereof
CN110757924B (en) * 2018-07-25 2022-04-08 中国石油化工股份有限公司 Heat shrinkable film
CN110757924A (en) * 2018-07-25 2020-02-07 中国石油化工股份有限公司 Heat shrinkable film composition
CN109616005B (en) * 2018-11-15 2021-05-04 永新股份（黄山）包装有限公司 Milky-white PE label film and production method thereof
CN109616005A (en) * 2018-11-15 2019-04-12 永新股份（黄山）包装有限公司 A kind of milky white PE label film and its production method
CN109733035A (en) * 2019-01-12 2019-05-10 山东中塑泰富科技有限公司 A kind of ultra-thin heavy packaging heat shrink films
CN110216904A (en) * 2019-06-11 2019-09-10 浙江优美新材料有限公司 A kind of preparation method of environment-friendly type automatic packaging film
CN111469519A (en) * 2020-04-07 2020-07-31 上海冠宝塑胶有限公司 High-transmittance PE (polyethylene) heat shrinkable film and preparation process thereof
CN111469520A (en) * 2020-04-07 2020-07-31 上海冠宝塑胶有限公司 Antirust antifogging PE shrink film and processing method thereof
CN111469520B (en) * 2020-04-07 2021-09-28 上海冠宝塑胶有限公司 Antirust antifogging PE shrink film and processing method thereof
CN111469519B (en) * 2020-04-07 2022-04-08 上海冠宝塑胶有限公司 High-transmittance PE (polyethylene) heat shrinkable film and preparation process thereof
CN112009058A (en) * 2020-09-14 2020-12-01 郑州新生印务有限公司 PE film for powder packaging and preparation method thereof
CN113246569A (en) * 2021-05-19 2021-08-13 上海紫江彩印包装有限公司 Polyethylene label film and preparation method and application thereof

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