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Easy-to-peel blown film and preparation method thereof

An easy-peeling, film-layer technology, applied to chemical instruments and methods, flat products, and other household appliances, etc., can solve the problems that the peeling force is greatly affected by the processing temperature, the temperature of the heat-sealing window is narrow, and it is easy to form a dead seal. The effect of low processing difficulty, low cost and wide adaptability

Pending Publication Date: 2021-11-16
JIANGYIN BAOBO NEW TYPE PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat-sealing window temperature of EVA film and PB-1 film is relatively narrow. After exceeding the window temperature, the peeling force increases exponentially, and it is easy to form a dead seal; greater impact; in addition, EVA film also has the risk of n-hexane leachables

Method used

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  • Easy-to-peel blown film and preparation method thereof
  • Easy-to-peel blown film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] The invention is an easy-peeling blown film, which is a co-extruded blown film, comprising a heat-sealing layer, an intermediate layer and an outer layer arranged sequentially from the inside to the outside; the heat-sealing layer is calculated by weight fraction The raw material components include 10 parts of talc, 77 parts of LDPE resin, the melt index of the LDPE resin is 0.75-6, 7 parts of polyethylene wax, 3 parts of slip agent, and 3 parts of synthetic silica; The thickness of the sealing layer is 6um, and the particle size of the talc is 4um; the middle layer and the outer layer are both LDPE film layers.

[0022] The preparation method of described easy-peeling blown film, comprises the steps:

[0023] S1. Prepare the easy-to-peel masterbatch, weigh talc according to twice the amount of talc required for the heat-sealing layer, weigh polyethylene resin equal to the talc, and weigh 1 / 4 of the dispersant, blend, and twin-screw Extrude and granulate to make 2 time...

Embodiment 2

[0028] The difference between Example 2 and Example 1 is that the heat-sealing layer includes 30 parts of talc, 57 parts of LDPE resin, 7 parts of polyethylene wax, 3 parts of slip agent, and 3 parts of synthetic zeolite.

Embodiment 3

[0030] The difference between Example 3 and Example 1 is that the heat-sealing layer includes 50 parts of talc, 37 parts of LDPE resin, 7 parts of edible white oil, 3 parts of slippery agent, and 3 parts of synthetic zeolite.

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Abstract

The invention discloses an easy-to-peel blown film. The easy-to-peel blown film comprises a heat sealing layer, a middle layer and an outer layer which are sequentially arranged from inside to outside, the heat sealing layer comprises the following raw material components in parts by weight: 10-50 parts of talc, 30-90 parts of polyethylene resin and / or polypropylene resin, 1-10 parts of a dispersing agent, 1-5 parts of a slipping agent and 1-5 parts of an anti-blocking agent; the thickness of the heat sealing layer is not less than 6 microns, and the particle size of the talc is 4-12 microns; the middle layer and the outer layer are both polyethylene resin and / or polypropylene resin film layers. The invention also discloses a preparation method of the easy-to-peel blown film. The easy-to-peel blown film disclosed by the invention has the advantages of reasonable proportion, wide heat-sealing window and stable peel force value; the deviation of heat sealing strength is small, the temperature of a heat sealing window is higher than 80 DEG C, and a heat sealing surface becomes white when being uncovered and is free of wiredrawing and residues and free of pause when being opened; and the blown film is suitable for sealing various materials such as PP and PE. The preparation method of the easy-to-peel blown film disclosed by the invention is low in processing difficulty and free of solvent dissolution or residue.

Description

technical field [0001] The invention relates to the technical field of packaging films, in particular to an easy-peel blown film with a stable force value and a wide heat-sealing window and a preparation method thereof. Background technique [0002] At present, quite a few foods on the market, such as low-temperature yogurt, jelly, cooked food, fresh fruit, etc., are packaged in cups, trays or ziplock bags. Most are composite membranes. For the convenience of consumers, most lid materials and the heat-sealing layer of the composite film of the self-sealing bag use a film with an easy-to-peel function, such as ethylene-vinyl acetate copolymer (EVA) film, or polybutene (PB-1 )film. However, the heat-sealing window temperature of EVA film and PB-1 film is relatively narrow. After exceeding the window temperature, the peeling force increases exponentially, and it is easy to form a dead seal; The impact is greater; in addition, EVA film also has the risk of n-hexane leachables...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/08B32B7/12B29D7/01C08J5/18C08L23/06C08L23/12C08K3/34
CPCB32B27/32B32B27/08B32B7/12B29D7/01C08J5/18C08J2323/06C08J2323/12C08J2323/08C08K3/34
Inventor 周大成陈伟俞国星
Owner JIANGYIN BAOBO NEW TYPE PACKAGING MATERIAL