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A kind of cast CPE heat-sealing easy-tear cover film and preparation method thereof

An easy-tear cap and casting technology, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc. NY/MPET material film compounding and other issues, to achieve the effect of improving bonding strength and easy tearing performance, improving easy peeling and tearing performance, bending strength and impact strength

Active Publication Date: 2021-06-11
福建立邦包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing CPE film has the advantages of good cooling effect, high mechanical strength, good toughness, and not easy to tear. However, when this CPE film is used as a heat-sealing cover film, it can only be heat-sealed for PP / PE / PS cups. , can not be heat-sealed PET material structure cup body, can not achieve the effect of easy tearing and peeling, and can not be effectively compounded with NY / MPET material film

Method used

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  • A kind of cast CPE heat-sealing easy-tear cover film and preparation method thereof
  • A kind of cast CPE heat-sealing easy-tear cover film and preparation method thereof
  • A kind of cast CPE heat-sealing easy-tear cover film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0050] Preparation Example 1: (1) Add 1.4 kg of isophorone diisocyanate to 1 kg of polyether 210, and pass through nitrogen, react at 75 ° C for 2 hours, add 0.3 kg of dimethylol propionic acid and 0.1 kg of dilauric acid diisocyanate Butyl tin, add 1.8kg 1,4-butanediol, 0.8kg trimethylolpropane and 3kg acetone, stir for 1h, cool down to 70°C, add 2kg polydimethylsiloxane and 1.8kg triethylamine, stir for 15min , add 5kg of deionized water, disperse for 30min, and distill under reduced pressure to remove acetone to obtain PU emulsion;

[0051] (1) Mix 1kg PU emulsion, 0.3kg emulsifier, and 3kg water, add 0.5kg initiator AIBN BA solution, stir, polymerize at 80°C for 3h, heat up to 90°C, react for 1h, cool down to room temperature, and discharge , to prepare modified water-based polyurethane.

preparation example 2

[0052] Preparation Example 2: (1) Add 1.9kg of isophorone diisocyanate to 2kg of polyether 210, and pass through nitrogen, react at 78°C for 1.8h, add 0.5kg of dimethylol propionic acid and 0.3kg of dilauric acid Dibutyltin, add 2.2kg 1,4-butanediol, 0.9kg trimethylolpropane and 4kg acetone, stir for 1.3h, cool down to 70°C, add 2.5kg polydimethylsiloxane and 2.1kg triethylamine , stirred for 18 minutes, added 8kg of deionized water, dispersed for 30 minutes, decompressed distillation to remove acetone, and obtained PU emulsion;

[0053] (1) Mix 2kg PU emulsion, 0.4kg emulsifier, and 4kg water, add 0.6kg initiator AIBN BA solution, stir, polymerize at 83°C for 2.8h, heat up to 90°C, react for 1.3h, and cool down to room temperature, Discharging to obtain modified water-based polyurethane.

preparation example 3

[0054] Preparation Example 3: (1) Add 2.4kg of isophorone diisocyanate to 3kg of polyether 210, and pass through nitrogen, react at 80°C for 1.5h, add 0.8kg of dimethylol propionic acid and 0.5kg of dilauric acid Dibutyltin, add 2.6kg 1,4-butanediol, 1.1kg trimethylolpropane and 5kg acetone, stir for 1.5h, cool down to 70°C, add 3kg polydimethylsiloxane and 2.4kg triethylamine, Stir for 20 minutes, add 10kg of deionized water, disperse for 30 minutes, and distill under reduced pressure to remove acetone to obtain PU emulsion;

[0055] (1) Mix 3kg PU emulsion, 0.5kg emulsifier, and 5kg water, add 0.7kg initiator AIBN BA solution, stir, polymerize at 85°C for 2.5h, heat up to 90°C, react for 1.5h, and cool down to room temperature, Discharging to obtain modified water-based polyurethane.

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Abstract

The invention discloses a cast CPE heat-sealable easy-tear cover film and a preparation method thereof. The cast CPE heat-sealable easy-to-tear film includes a corona layer, an intermediate layer and a heat-sealing layer connected in sequence; the corona layer includes the following raw materials in parts by weight: 76-80 parts of LLDPE, 18-22 parts of LDPE, 0.8-22 parts 1.2 parts of opening slippery agent, 0.8-1.2 parts of processing aid; Described intermediate layer comprises LLDPE; Described heat-sealing layer comprises the raw material of following weight part: 8-12 parts of mLLDPE, 86-90 parts of modified waterborne polyurethane, 1.8 parts ‑2.2 parts of processing aid. The cast CPE heat-sealable and easy-to-tear cover film of the present invention has the advantages of being easy to heat-seal with a cup body made of PET / PVC / PS / PE, and achieving the effect of easy tearing and peeling.

Description

technical field [0001] The invention relates to the technical field of plastic packaging, more specifically, it relates to a casting CPE heat-sealable easy-tear film and a preparation method thereof. Background technique [0002] The earliest cover film appeared in the packaging of instant noodle bowls, and then the packaging of tofu, yogurt, jelly, pudding, etc. also appeared cover film. The cover film has the following requirements: high barrier property, moderate heat sealability 1. The sealing should have good pollution resistance, low temperature heat sealing performance, good shrinkage and so on. [0003] Polyethylene film is non-toxic and tasteless and has good low temperature resistance, moisture resistance, moisture permeability resistance and anti-aging performance. It is one of the plastic films with the largest production volume in my country. Casting method and biaxial stretching method, in which, since the cast polyethylene film is a flat extruded film, the sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/08B32B27/32B32B27/40C08L23/08C08L23/06C08L75/08C08L77/10C08L55/02C08L71/12C08J5/18
CPCB32B27/08B32B27/32B32B27/40C08J5/18C08J2323/08C08J2375/08C08J2423/06C08J2423/08C08J2455/02C08J2471/12C08J2477/10
Inventor 邓根生
Owner 福建立邦包装有限公司
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