Anti-stretching reticular wrapping film and preparation method thereof

A wrapping film, anti-stretching technology, applied in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of high cost and complex process of anti-stretch wrapping film, achieve low cost, improve horizontal and vertical direction Tensile strength, simple process effect

Pending Publication Date: 2021-03-26
黄山源点新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of anti-stretch stretch film and its preparation method, to solve the problem of complex process and high cost of the existing anti-stretch stretch film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The invention also discloses a preparation method of an anti-stretch mesh winding film, comprising the following steps:

[0017] 1) Modify PE: Add PE and calcium carbonate into the reactor according to the weight ratio of 10:1~1.2, add water vapor into the reactor through an ultrasonic humidifier and keep stirring for 1~1.5 hours; then turn off the ultrasonic humidification and add LLDPE to the reactor at room temperature and continue to stir evenly;

[0018] 2) Put the raw materials of the inner layer and the outer layer into two reaction kettles at room temperature and stir evenly;

[0019] 3) Input the homogeneously stirred raw materials in step 1) and step 2) into the extrusion screw respectively, heat them in vacuum to 170°C-190°C, and extrude them into a molten state;

[0020] 4) Transport the outer layer, middle layer and inner layer materials in the molten state to the outer cavity, middle cavity and inner cavity of the casting mold for blow molding.

Embodiment 1

[0021] Example 1: A stretch-resistant mesh stretch film, which is co-extruded from an inner layer, an intermediate layer and an outer layer of three-layer materials, and the raw material of the outer layer and the inner layer is LLDPE with a mass percentage of 20%:80% and MPE, the raw material of the middle layer is 30%: 70% LLDPE and modified PE; the thickness ratio of the inner layer, middle layer and outer layer is 1:2:1. The modified PE is obtained by adding calcium carbonate to PE for mixing and humidifying the mixed material by an ultrasonic humidifier. Among them, the weight ratio of PE to calcium carbonate is 10:1. Fully stir in the reactor to make the water content reach 0.1%. This method can effectively overcome the problem that PE does not absorb water, and the addition of calcium carbonate will not affect the entire winding. stretching effect of the film.

[0022] A preparation method for stretch-resistant net-shaped stretch film, comprising the following steps: ...

Embodiment 2

[0027] Embodiment 2: A stretch-resistant net-shaped winding film, which is co-extruded from an inner layer, an intermediate layer and an outer layer of three-layer materials, and the raw material of the outer layer and the inner layer is LLDPE with a mass percentage of 25%:75% and MPE, the raw material of the middle layer is 25%: 75% LLDPE and modified PE; the thickness ratio of the inner layer, middle layer and outer layer is 2:3:2. The modified PE is obtained by adding calcium carbonate to PE for mixing and humidifying the mixed material by an ultrasonic humidifier. Among them, the ratio of PE to calcium carbonate by weight is 10:1.2, and it is fully stirred in the reactor to make the water content reach 0.12%.

[0028] A preparation method for stretch-resistant net-shaped stretch film, comprising the following steps:

[0029] 1) Modify PE: Add PE and calcium carbonate into the reactor according to the weight ratio of 10:1.2, add water vapor into the reactor through an ultr...

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PUM

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Abstract

The invention discloses an anti-stretching reticular wrapping film and a preparation method thereof, the wrapping film is formed by co-extruding three layers of materials, namely an inner layer, a middle layer and an outer layer, the outer layer and the inner layer are made of LLDPE and MPE in a mass percentage ratio of (20-30%): (70-80%), the middle layer is made of LLDPE and modified PE in a mass percentage ratio of (20-30%): (70-80%), and the moisture content of the modified PE is 0.1-0.12%. The middle layer PE is mainly improved, a net-shaped connecting structure is generated between the middle layer and the inner and outer layers through an extrusion process, so that the transverse and longitudinal tensile strength of the wrapping film is improved, the process is simple, the cost is low, and the wrapping film can be widely applied to the field of wrapping films.

Description

technical field [0001] The invention belongs to the technical field of stretch film processing, and in particular relates to an anti-stretch mesh stretch film and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of stretch film production technology, its application fields have become wider and wider, including product packaging, sealing, and rust prevention. Domestic packaging stretch film is generally made of PVC and DOA as the main material. With its retractability, the product can be tied into a unit to prevent the products from being separated from each other. It has a certain viscosity and is widely used in foreign trade export and papermaking. , hardware appliances, plastics, chemicals, building materials, etc. For different purposes, different types of stretch films have also been developed, such as strong tensile, high strength, high puncture resistance, etc. However, the existing stretch-resistant stretc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/32B32B33/00B29C55/28B29L7/00
CPCB32B27/08B32B27/32B32B27/327B32B27/20B32B33/00B29C55/28B32B2250/242B32B2307/54B29L2007/008
Inventor 黄亮胡继超程杰方为民孙争光
Owner 黄山源点新材料科技有限公司
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