Ultrathin plastic film, preparation method of ultrathin plastic film and express bag

A plastic film, ultra-thin technology, applied in the field of plastic products, can solve the problems of mechanical properties decline, etc., and achieve the effect of good mechanical properties, low manufacturing cost, and thin thickness

Pending Publication Date: 2021-02-26
SHENZHEN S F TAISEN HLDG (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of ultra-thin plastic film, the preparation method of ultra-thin plastic film and courier bag, aim at solving the problem that the thickness of the plastic film used for making courier bag in the prior art is lower than 0.05mm and will cause its Technical problems of mechanical property degradation

Method used

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  • Ultrathin plastic film, preparation method of ultrathin plastic film and express bag
  • Ultrathin plastic film, preparation method of ultrathin plastic film and express bag

Examples

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preparation example Construction

[0071] Such as figure 2 As shown, the embodiment of the present invention also provides a method for preparing an ultra-thin plastic film 10, comprising the following steps:

[0072] S1: Provide the following raw materials for the inner surface layer 11 in parts by weight:

[0073] Linear low-density polyethylene 75% to 85%

[0074] Metallocene ethylene-hexene copolymer 12%~27%

[0075] Mixing the raw materials of the inner surface layer 11 evenly and blow molding the inner surface layer 11 film;

[0076] S2: Provide the following raw materials for the middle layer 12 in parts by weight:

[0077] High-density polyethylene 14% to 33%

[0078] Linear low-density polyethylene or metallocene polyethylene 56% to 87%

[0079] Mix the raw materials of the middle layer 12 evenly and blow them into the middle layer 12 film;

[0080] S3: Provide the following raw materials for the outer layer 13 in parts by weight:

[0081] Bimodal polyethylene 15%~37%

[0082] Linear Low Densi...

Embodiment 1

[0091] Weigh raw materials according to the following proportions:

[0092] The raw materials of the inner skin layer 11 include the following substances in weight percentage:

[0093] 80% linear low density polyethylene, 17% metallocene ethylene-hexene copolymer and 3% black masterbatch.

[0094] The raw material of middle layer 12 comprises the following material of percentage by weight:

[0095] High-density polyethylene 17%, linear low-density polyethylene or metallocene polyethylene 68%, and white masterbatch 15%.

[0096] The raw materials of the outer layer 13 include the following substances in percentage by weight:

[0097] Bimodal polyethylene 17%, linear low density polyethylene 68% and white masterbatch 15%.

[0098] Among them, the weight-average molecular weight of linear low-density polyethylene is 120,000 g / mol to 135,000 g / mol;

[0099] The weight average molecular weight of metallocene polyethylene is 240,000 g / mol to 260,000 g / mol;

[0100] The weight a...

Embodiment 2

[0104] Weigh raw materials according to the following proportions:

[0105] The raw materials of the inner skin layer 11 include the following substances in weight percentage:

[0106] 80% linear low density polyethylene, 17% metallocene ethylene-hexene copolymer and 3% black masterbatch.

[0107] The raw material of middle layer 12 comprises the following material of percentage by weight:

[0108] High-density polyethylene 17%, linear low-density polyethylene or metallocene polyethylene 68%, and white masterbatch 15%.

[0109] The raw materials of the outer layer 13 include the following substances in percentage by weight:

[0110] Bimodal polyethylene 17%, linear low density polyethylene 68% and white masterbatch 15%.

[0111] Among them, the weight-average molecular weight of linear low-density polyethylene is 110,000 g / mol to 125,000 g / mol;

[0112] The weight average molecular weight of metallocene polyethylene is 230,000 g / mol to 240,000 g / mol;

[0113] The weight a...

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Abstract

The invention belongs to the technical field of plastic products, and particularly relates to an ultrathin plastic film, a preparation method of the ultrathin plastic film and an express bag. The ultrathin plastic film includes an inner surface layer, a middle layer and an outer surface layer that are sequentially combined. The inner surface layer is prepared from the following raw materials in percentage by weight: 75%-85% of linear low-density polyethylene and 12%-27% of metallocene ethylene-hexene copolymer; the middle layer is prepared from the following raw materials in percentage by weight: 14%-33% of high-density polyethylene and 56%-87% of linear low-density polyethylene or metallocene polyethylene; the outer surface layer is prepared from the following raw materials in percentageby weight: 15 to 37 percent of bimodal polyethylene and 46 to 86 percent of linear low-density polyethylene. The thickness of the ultrathin plastic film is successfully reduced to about 0.04 mm by repeatedly testing the raw material composition and the weight ratio of the inner surface layer, the middle layer and the outer surface layer for multiple times, and meanwhile, the mechanical property ofthe ultrathin plastic film is ensured.

Description

technical field [0001] The invention belongs to the technical field of plastic products, and in particular relates to an ultra-thin plastic film, a preparation method of the ultra-thin plastic film and a courier bag. Background technique [0002] With the vigorous development of the e-commerce industry, the express delivery business has also entered a stage of rapid development. In express logistics, express bags are an important carrier for packaging and protecting express items. In the manufacturing of express bags, it is necessary to take into account both the satisfaction of mechanical performance indicators and strict cost control. [0003] In the prior art, in order to meet the mechanical performance index, the thickness of the plastic film used to make express bags is generally in the range of 0.05mm to 0.06mm. If the thickness is less than 0.05mm, its mechanical properties will decrease, making express bags easy to use Under the action of external forces such as imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/32C08L23/08C08L23/06C08J5/18B65D30/08
CPCB32B27/08B32B27/32C08J5/18B65D31/02C08J2323/08C08J2323/06C08J2423/06C08J2423/08
Inventor 武睿泽王梦琪王海龙张皓佳
Owner SHENZHEN S F TAISEN HLDG (GRP) CO LTD
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