Biaxially oriented poly lactic acid (BOPLA) thermal contraction type film for high-speed automatic packaging machine, and preparation method of BOPLA thermal contraction type film

An automatic packaging machine, heat shrinking technology, applied in applications, household utensils, flat products, etc., can solve the problems of poor thermal stability, brittle usability, difficult to meet the film, etc., to achieve good thermal stability, improved flexibility, improved The effect of surface properties

Active Publication Date: 2015-05-06
常州钟恒新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid has a high glass transition temperature, is brittle at room temperature, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example one

[0030] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:

[0031] (1) Prepare materials

[0032] Prepare polylactic acid resin, nano-scale silica, and silane coupling agent KH550. Among them, according to the mass ratio, the ratio of high molecular weight polylactic acid resin to low molecular weight polylactic acid resin is 10:1, and the nano-scale inorganic filler is total polylactic acid The amount of resin is 0.8%, and the silane coupling agent is 1% of the amount of inorganic filler.

[0033] (2) Masterbatch preparation

[0034] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin...

Example Embodiment

[0043] Example two

[0044] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:

[0045] (1) Prepare materials

[0046] Prepare polylactic acid resin, nano-scale silica, and silane coupling agent KH560. In terms of mass ratio, the ratio of high-molecular-weight polylactic acid resin to low-molecular-weight polylactic acid resin is 1:1, and nano-scale inorganic filler is total polylactic acid. The amount of resin is 0.6%, and the silane coupling agent is 0.1% of the amount of inorganic filler.

[0047] (2) Masterbatch preparation

[0048] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin-screw extruder, wh...

Example Embodiment

[0057] Example three

[0058] The preparation method of BOPLA heat-shrinkable film for high-speed automatic packaging machine has the following steps:

[0059] (1) Prepare materials

[0060] Prepare polylactic acid resin, nanometer calcium carbonate, silane coupling agent KH550, among which, according to the mass ratio, the ratio of high molecular weight polylactic acid resin to low molecular weight polylactic acid resin is 20:1, and nanometer inorganic filler is total polylactic acid resin The dosage is 1.2%, and the silane coupling agent is 1.5% of the inorganic filler.

[0061] (2) Masterbatch preparation

[0062] Put the nano-scale inorganic filler into a solid mixer, spray the silane coupling agent solution on the filler, stir at high speed for 30 minutes, and then dry it at a temperature of 120° C. for 2 hours. The polylactic acid resin and the processed nano-scale inorganic filler are uniformly stirred by a mixer, and then the mixture is extruded and granulated by a twin-screw ...

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Abstract

The invention relates to a biaxially oriented poly lactic acid (BOPLA) thermal contraction type film for a high-speed automatic packaging machine. The film comprises the following components: high molecular weight polylactic resin, low molecular weight polylactic resin, nanoscale inorganic filler and a silane coupling agent, wherein the mass ratio of the high molecular weight polylactic resin to the low molecular weight polylactic resin is equal to (1-20): 1, the dosage of the nanoscale inorganic filler is 0.6-1.2% of that of the total polylactic resin, and the dosage of the silane coupling agent is 0.1-2% of that of the inorganic filler; a preparation method of the BOPLA thermal contraction type film for the high-speed automatic packaging machine comprises the steps of evenly mixing all the components according to the content, carrying out melt extrusion, casting a sheet by curtain coating, and preparing the BOPLA thermal contraction type film by adopting a biaxially oriented method. The BOPLA thermal contraction type film has the beneficial effects that the BOPLA thermal contraction type film prepared by the technical scheme is low in friction coefficient, good in heat seal performance, high in hot-shrinkage rate and excellent in mechanical property, so that the requirements for the thermal contraction type film used for the automatic packaging machine can be met.

Description

technical field [0001] The invention relates to the technical field of packaging film preparation, in particular to a BOPLA heat-shrinkable film for a high-speed automatic packaging machine and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, polymer film materials are widely used in human life and work, especially in the field of packaging materials. However, most of the polymer film materials currently used are difficult to degrade in the natural environment, and a large number of discarded polymer film materials will cause serious white pollution. With the continuous development of the world economy today, saving resources and protecting the environment have become important means to implement sustainable development. Green products that are harmless to the human body and the environment will increasingly become the leading direction of future product production with the deepening of sustainable develop...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K9/06C08K3/36C08K3/26B29D7/01
Inventor 袁珣刘俊萍李闯柳晓徐银
Owner 常州钟恒新材料股份有限公司
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