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Low-melting-point packaging film and application thereof to preparation of packaging bag

A low melting point, packaging film technology, applied in the field of packaging materials, can solve the problems of large vertical and horizontal strength differences, affect applications, and low sealing strength, achieve consistent vertical and horizontal physical properties, improve bag making methods, and high sealing strength Effect

Inactive Publication Date: 2017-05-31
仲铂新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The appearance of the packaging bag has obvious defects, wrinkles, low transparency, poor dimensional stability of the packaging bag, low sealing strength, and easy damage;
[0004] (2) The physical property index is low, and the vertical and horizontal differences in strength are large, resulting in frequent damage in the direction of low strength (especially for small-sized bags), and due to anisotropic anisotropy, the elongation of the package changes greatly , it is very easy to deform after loading the material, resulting in broken leaks;
[0005] (3) The distribution of melting point is uneven and the temperature difference is large, which affects subsequent applications and directly affects the product quality of downstream customers;
[0006] (4) Due to the limitation of current domestic equipment, the production process plan of the low-melting point packaging bag is unreasonable, resulting in the quality of the packaging bag not meeting the requirements for use

Method used

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  • Low-melting-point packaging film and application thereof to preparation of packaging bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for making a low-melting point packaging bag, the method comprising the following steps:

[0037] (1) Mixing granules: According to the preset mass percentage, mix the following raw materials evenly to obtain the mixed material:

[0038] 90% ethylene vinyl acetate copolymer, 2% silica, 8% composite opening masterbatch;

[0039] (2) Film blowing: Use a film blowing machine to heat and melt the mixture and process it into a raw film with an inflation ratio of 3:1;

[0040] Then, the raw material film is cooled at 20°C by using the internal and external cooling method of the film bubble to obtain a low-melting point packaging film;

[0041] (3) bag making (such as figure 1 shown):

[0042] 1) Cut the low-melting-point packaging film according to the preset bag width W (400mm) along the length extension direction of the low-melting-point packaging film to obtain multiple small-sized low-melting-point packaging films;

[0043] 2) Carry out double-sided heat-seal...

Embodiment 2

[0045] A method for making a low-melting point packaging bag, the method comprising the following steps:

[0046] (1) Mixing granules: According to the preset mass percentage, mix the following raw materials evenly to obtain the mixed material:

[0047] 90% ethylene vinyl acetate copolymer, 2% silica, 8% composite opening masterbatch;

[0048] (2) Film blowing: Use a film blowing machine to heat and melt the mixture and process it into a raw film with an inflation ratio of 5:1;

[0049] Then, the raw material film is cooled at 10°C by using the internal and external cooling method of the film bubble to obtain a low-melting point packaging film;

[0050] (3) bag making (such as figure 1 shown):

[0051] 1) Cut the low-melting-point packaging film according to the preset bag width W (300mm) along the length extension direction of the low-melting-point packaging film to obtain a plurality of small-sized low-melting-point packaging films;

[0052] 2) Carry out double-sided hea...

Embodiment 3

[0054] A method for making a low-melting point packaging bag, the method comprising the following steps:

[0055] (1) Mixing granules: According to the preset mass percentage, mix the following raw materials evenly to obtain the mixed material:

[0056] 90% ethylene vinyl acetate copolymer, 2% silica, 8% composite opening masterbatch;

[0057] (2) Film blowing: Use a film blowing machine to heat and melt the mixture and process it into a raw film with an inflation ratio of 4:1;

[0058] Then, the raw material film is cooled at 15°C by using the internal and external cooling method of the film bubble to obtain a low-melting point packaging film;

[0059] (3) bag making (such as figure 1 shown):

[0060] 1) Cut the low-melting-point packaging film according to the preset bag width W (250mm) along the length extension direction of the low-melting-point packaging film to obtain multiple small-sized low-melting-point packaging films;

[0061] 2) Carry out double-sided heat-seal...

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Abstract

The invention discloses a low-melting-point packaging film and application thereof to preparation of a packaging bag. A formula of the low-melting-point packaging film comprises the following raw materials in percentage by mass: 90 percent of ethylene vinyl acetate copolymer, 2 percent of silicon dioxide and 8 percent of compound openability master batch. In the formula, the silicon dioxide serving as a nucleating agent is added, so that the packaging film has high transparency; moreover, the melting point is controlled at 73+ / -1 DEG C, so that the low-melting-point packaging film is stable in melting point, and is prevented from being damaged. The low-melting-point packaging film is particularly suitable for producing a low-melting-point packaging bag which is less than or equal to 400mm in bag width; the obtained packaging bag is stable in size, is consistent in longitudinal and horizontal physical properties, has high sealing strength, high transparency and superior appearance, is prevented from being deformed or damaged easily, and is free from wrinkles.

Description

technical field [0001] The invention relates to a packaging material, in particular to a low melting point packaging film and its application in preparing packaging bags. Background technique [0002] With the improvement of environmental protection requirements, all walks of life are working hard to meet environmental protection standards. The rubber industry has changed from the original open feeding to closed feeding to reduce the pollution of materials to the environment, thus producing industry-specific low-melting point plastic packaging bags. At present, although my country has started on low-melting point packaging bags, there are still many problems, mainly manifested in the following aspects: [0003] (1) The appearance of the packaging bag has obvious defects, wrinkles, low transparency, poor dimensional stability of the packaging bag, low sealing strength, and easy damage; [0004] (2) The physical property index is low, and the vertical and horizontal strength...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K3/36B31B70/00B31B160/10
CPCC08K3/36C08J5/18C08J2323/08C08L2201/10C08L2203/162C08L2205/24C08L23/0853
Inventor 周中华
Owner 仲铂新材料有限公司
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