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Film with characteristic of easy tearing in longitudinal direction, and preparation method thereof

A film and longitudinal technology, applied in the field of longitudinal easy tearing film and its preparation, can solve the problems of no light transmission, the bag mouth is not easy to tear, the tear opening is not flat, etc. Good toughness

Active Publication Date: 2018-01-26
苏州沃贝得无尘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also brings the problem that the pocket is not easy to tear open with bare hands, and unpacking is inconvenient
There are several types of easy-to-tear packages on the market: the first is to use a special machine to make easy-to-tear packaging. This kind of tear is not smooth and does not have complete airtightness.
The second is polyethylene terephthalate (PET) material, which is easy to tear and has the disadvantages of uncontrollable tearing direction and low strength.
The third type is composite (usually aluminum foil) easy-to-tear packaging, which has no light transmission and is expensive
[0003] Therefore, the market needs a polyethylene (PE) film without easy-to-tear line, which solves the problem of unpacking convenience and does not affect the shelf life of the contents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] S1, weigh 5 parts of low-density polyethylene (LDPE), 2 parts of linear low-density polyethylene (LLDPE), 1 part of polyethylene wax (PE wax), 1 part of ethylene-vinyl acetate copolymer (EVA), polybutene (PB) 1 copy;

[0018] S2, put LDPE, LLDPE, PE wax, EVA and PB into the mixer, and stir at a speed of 100r / min for 15min;

[0019] S3, pour the material stirred in S2 into the hopper of the film blowing machine;

[0020] S4, plasticizing and extruding the material in S3→blowing traction→air ring cooling→herringbone splint→traction roller traction→film winding to produce a rolled film.

Embodiment 2

[0022] S1, weigh 4 parts of low-density polyethylene (LDPE), 3 parts of linear low-density polyethylene (LLDPE), 0.5 parts of polyethylene wax (PE wax), 2 parts of ethylene-vinyl acetate copolymer (EVA), polybutene (PB) 0.5 parts;

[0023] S2, put LDPE, LLDPE, PE wax, EVA and PB into the mixer, and stir at a speed of 100r / min for 15min;

[0024] S3, pour the material stirred in S2 into the hopper of the film blowing machine;

[0025] S4, plasticizing and extruding the material in S3→blowing traction→air ring cooling→herringbone splint→traction roller traction→film winding to produce a rolled film.

Embodiment 3

[0027] S1, weigh 4.5 parts of low-density polyethylene (LDPE), 2.5 parts of linear low-density polyethylene (LLDPE), 1 part of polyethylene wax (PE wax), 1.5 parts of ethylene-vinyl acetate copolymer (EVA), polybutene (PB) 0.5 parts;

[0028] S2, put LDPE, LLDPE, PE wax, EVA and PB into the mixer, and stir at a speed of 100r / min for 15min;

[0029] S3, pour the material stirred in S2 into the hopper of the film blowing machine;

[0030] S4, plasticizing and extruding the material in S3→blowing traction→air ring cooling→herringbone splint→traction roller traction→film winding to produce a rolled film.

[0031] The film that embodiment 1,2 and 3 prepares is carried out performance test, and the result is as shown in table 1:

[0032] Table 1

[0033] nature

[0034] As can be seen from Table 1, the films prepared in Examples 1, 2 and 3 are easy to tear longitudinally, so the strength required for tearing is small, and no particles are produced at the tearing positio...

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PUM

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Abstract

The invention discloses a film with a characteristic of easy tearing in a longitudinal direction, wherein the film comprises, by mass, 40-50% of low density polyethylene, 20-30% of linear low-densitypolyethylene, 5-10% of polyethylene wax, 10-20% of an ethylene-vinyl acetate copolymer, and 5-10% of polybutene. According to the present invention, the film is easy to tear in a longitudinal direction, wherein the force for tearing is small; and the film has good transverse toughness, such that the package is conveniently unpacked while the shelf life of the content cannot be affected.

Description

technical field [0001] The invention relates to the technical field of packaging, in particular to a longitudinal easy-tear film and a preparation method thereof. Background technique [0002] Polyethylene (PE) film is the most used plastic packaging film, accounting for more than 40% of the total consumption of plastic film. Polyethylene (PE) film has good toughness, moisture resistance and heat sealing performance, and is easy to process and shape, and the price is cheap, so it is very widely used in food, medicine, electronics and other industries. But it also brings the problem that the bag mouth is not easy to tear open with bare hands, and it is inconvenient to unpack. There are the following types of easy-to-tear packages on the market: The first type is a package that uses special machinery to make easy-to-tear lines. This kind of tear opening is uneven and not completely airtight. The second type is easy-to-tear packaging made of polyethylene terephthalate (PET), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/20
Inventor 钟义云
Owner 苏州沃贝得无尘材料有限公司
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