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Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof

A three-layer co-extrusion, production method technology, applied in the field of packaging materials, can solve the problems of low fastness, low rigidity, shrinkage rate and shrinkage force of packaged items, etc.

Inactive Publication Date: 2008-12-10
大连华诺塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the polyethylene heat shrinkable film used in the domestic packaging market is a film blown by a single-layer blown film unit. Due to its small shrinkage rate and shrinkage force, various functions are not complete. The Chinese invention patent of CN1285663C discloses a " High-transparency polyethylene heat-shrinkable film and its production method", which improves the transparency of polyethylene heat-shrinkable film and improves its surface properties, but because the film has only one layer structure, its rigidity is low and the cost is high
Its mechanical properties are far from meeting the increasing requirements of packaging products
[0004] The heat-shrinkable film products with large shrinkage rate and shrinkage force produced at home and abroad are generally produced by the method of down blowing and secondary inflation. The advantage of this method is that the product has high transparency and the transverse shrinkage rate is about 50%. If it is less than 70%, the tightness of the packaged items is not high, the comprehensive function of the product is not complete, the structure of the production equipment is complex, the operation is not easy to master, the investment in production equipment is large, and the production cost is high

Method used

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  • Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof
  • Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof
  • Trilaminar co-extrusion thermal contraction resin film, manufacturing method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0174] Building materials (such as hollow bricks, floor tiles, refractory bricks, ceramic products, etc.), chemical raw materials and other bagged items packed in packaging trays, in order to prevent a large amount of dust from being adsorbed on the outer surface of the packaging and reduce the impact of sunlight on the performance of the packaging , add antistatic masterbatch and weather resistance antiaging masterbatch to the raw material of the outer layer extruder:

[0175] The composition that each layer contains and the percentage by weight between it are:

[0176] inner layer

[0177] LDPE 54.35%

[0178] LLDPE 43.48%

[0179] Antistatic agent 2.17%

[0180] Middle

[0181] HDPE 9.80%

[0182] LLDPE 39.22%

[0183] PP or EVOH recycled material 49.02%

[0184] Compatibilizer 1.96%

[0185] outer layer

[0186]LDPE 83.33%

[0187] Antistatic agent 13.89%

[0188] Anti-aging agent 2.78%

[0189] Its production process steps are:

[0190] (1) Extrusion: Mix the...

Embodiment 2

[0196] When packaging food-grade glass bottles and other utensils and food collective packaging, antibacterial masterbatch is added to the inner layer of extrusion, and anti-aging masterbatch is added to the outer layer to ensure hygienic quality;

[0197] The composition that each layer contains and the percentage by weight between it are:

[0198] inner layer

[0199] LDPE 54.35%

[0200] LLDPE 43.48%

[0201] Antibacterial Masterbatch 2.17%

[0202] Middle

[0203] LLDPE 44.44%

[0204] LDPE 44.44%

[0205] mPE 11.11%

[0206] outer layer

[0207] LDPE 32.61%

[0208] LLDPE 65.22%

[0209] Anti-aging agent 2.17%

[0210] Its production process steps are:

[0211] (1) Extrusion: Mix the raw materials of each layer in proportion and send them to the three extruders of the three-layer co-extrusion film blowing unit for extrusion;

[0212] (2) Blown film: made by one-time blowing of a three-layer co-extrusion blown film unit;

[0213] (3) cooling;

[0214] The thr...

Embodiment 3

[0217] Packaging machinery parts (such as flanges, iron castings, etc.) In order to prevent the items from being wet and rusted, which will affect the assembly and use, anti-rust masterbatch is added to the inner layer of the extruder, and anti-aging masterbatch is added to the outer layer of raw materials;

[0218] The composition that each layer contains and the percentage by weight between it are:

[0219] inner layer

[0220] LDPE 48.54%

[0221] LLDPE 48.54%

[0222] Rust inhibitor 2.91%

[0223] Middle

[0224] HDPE 9.80%

[0225] LLDPE 39.22%

[0226] PA or EVOH recycled material 49.02%

[0227] Compatibilizer 1.96%

[0228] outer layer

[0229] LLDPE 83.33%

[0230] mPE 13.89%

[0231] Anti-aging agent 2.78%

[0232] Its production process steps are:

[0233] (1) Extrusion: Mix the raw materials of each layer in proportion and send them to the three extruders of the three-layer co-extrusion film blowing unit for extrusion;

[0234] (2) Blown film: made by ...

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Abstract

The invention discloses a three-layer coextrusion heat shrinkage resin film, a production method and an application method. The-three layer coextrusion heat shrinkage resin film is produced by taking PE(LDPE, HPPE, LLDPE, mPE), EVA, PP, PA and EVOH resins as the main materials which are matched with a functional master batch and adopting a production method of one-step huffing. The largest transverse and longitudinal shrinking rates of the product can reach 60 percent and 85 percent; the largest shrinking force of the product can reach 2.0N / cm. The shrinking rate and the shrinking force of the product can be controlled and adjusted by controlling various technical parameters to lead a package to be firm and endurable. The packaged objects are pertinently led to reach the anti-rust, anti static, illumination-resistance, anti-aging, anti-puncturing, anti-low-temperature, anti-isolation, anti-bacteria and anti-degradation effects and the like by adjusting the material composition and mixture ratio of each layer. The three-layer coextrusion heat shrinkage resin film is used for replacing the traditional paper box wrappage to reduce the packaging cost. The mechanical properties are good, the pertinence is strong, the materials are saved; when the three-layer coextrusion heat shrinkage resin film is used, the shrinking temperature is low, the power is saved and the packaging cost is saved, thus effectively reducing the production cost and having extremely high application value.

Description

technical field [0001] The invention belongs to the field of packaging materials, in particular to plastic packaging materials for collective packaging. Background technique [0002] Commodity outer packaging plays an important role in the storage, quality preservation and beautification of the commodity itself. With the continuous improvement of consumers' requirements for commodity packaging, packaging manufacturers need to continuously introduce more new packaging products. [0003] At present, the polyethylene heat shrinkable film used in the domestic packaging market is a film blown by a single-layer blown film unit. Due to its small shrinkage rate and shrinkage force, various functions are not complete. The Chinese invention patent of CN1285663C discloses a " High-transparency polyethylene heat-shrinkable film and its production method", the film improves the transparency of polyethylene heat-shrinkable film and improves its surface properties, but because the film has...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/18C08L23/06C08L23/08C08L23/12C08L77/00C08K13/02C08K3/04C08K5/20C08K3/26C08K5/098C08L5/08C08K5/134C08K3/22B29C47/06B29C47/38B29C47/78B29C47/92B29C49/04B65B53/02B29K23/00
Inventor 李德龙
Owner 大连华诺塑胶科技有限公司
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