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PE/CaCO3 breathable film masterbatch and preparation method thereof

A technology of breathable film and masterbatch, applied in the field of PE/CaCO3 breathable film masterbatch and its preparation, can solve the problems of poor compatibility, inability to achieve particle size distribution, wide particle size distribution range, etc. The effect of uniform distribution, complete surface modification and narrow particle size distribution

Inactive Publication Date: 2018-10-30
池州市锐强新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN101643559A discloses an ultra-thin, highly air-permeable film and its preparation method. It pays special attention to the preparation of plastic masterbatch and the process of film processing, while ignoring the particle size, distribution range and surface of calcium carbonate. Modification, so that the comprehensive performance of the breathable membrane is affected to varying degrees
[0004] Chinese patent document CN104558751A discloses a composition and method for preparing an ultra-thin gas-permeable membrane, wherein the inorganic particles used have a relatively large particle size and a wide range of particle size distribution, making it difficult to meet the requirements of gas-permeable and impermeable membranes
[0005] Chinese patent document CN105504441A discloses a special masterbatch for polyolefin breathable film and its preparation method. The prepared masterbatch needs to be blended with other plastic resins in the production process of breathable film, which may affect the performance of various plastic resins. The degree of uniformity of mixing, which affects production
[0007] (1) The particle size distribution range is wide, which cannot meet the requirements of the breathable membrane for the narrow particle size distribution of ground calcium carbonate fillers
[0008] (2) The presence of large-sized calcium carbonate particles causes a large number of pinhole defects in the film during the stretching process
[0009] (3) After the surface modification of the filler particles, the compatibility with the plastic resin is not good, resulting in a decrease in the strength of the plastic film, which cannot meet the requirements for use
[0010] (4) The dispersion of the filler particles is not good, and it is easy to migrate on the surface of the breathable membrane, resulting in color difference or color spots in the breathable membrane, thus affecting the quality of the breathable membrane
[0011] (5) The modifier used does not consider toxicity and cannot meet the hygienic requirements of the breathable membrane
[0012] Aiming at the problems of uneven calcium carbonate particle size, uneven dispersion in plastic resin and low tensile strength of breathable film masterbatch in the current breathable film masterbatch, the present invention provides a PE / CaCO 3 Preparation method of breathable film masterbatch and PE / CaCO for breathable film products prepared by this method 3 Masterbatch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Commercially available ground calcium carbonate with a D50 particle size of 100 mesh is pulverized and classified by a jet mill to obtain unmodified ultrafine ground calcium carbonate powder with a particle size distribution range of D50=3.5 μm and D97=8.8 μm material;

[0047] (2) Place the unmodified superfine ground calcium carbonate powder in an oven at 130°C and dry to a moisture content of 0.29%;

[0048] (3) After cooling to 40°C, place 46 parts of dried superfine heavy calcium carbonate powder in a high-speed mixer, add 0.25 parts of borate coupling agent, mix at high speed and heat up to 140°C, and keep warm for 3 min to make it fully responsive;

[0049] (4) After cooling to 80°C, add 0.5 parts of epoxidized soybean oil, mix at high speed and heat up to 110°C, keep warm for 15 minutes to make it fully react;

[0050] (5) Cool to 90°C, then add 0.5 parts of polyethylene wax and 0.25 parts of calcium stearate, mix at high speed and heat up to 130°C, keep w...

Embodiment 2

[0056] (1) Commercially available ground calcium carbonate with a D50 particle size of 325 mesh was pulverized and classified by a jet mill to obtain unmodified ultrafine ground calcium carbonate powder with a particle size distribution range of D50=3.3 μm and D97=8.4 μm material;

[0057] (2) Place the unmodified superfine ground calcium carbonate filler in an oven at 105°C and dry to a moisture content of 0.25%;

[0058] (3) After cooling to 45°C, put 48 parts of dried superfine heavy calcium carbonate powder in a high-speed mixer, add 0.5 part of titanate coupling agent, mix at high speed and raise the temperature to 130°C, and keep warm for 8 min to make it fully responsive;

[0059] (4) After cooling to 60°C, add 0.25 parts of stearic acid and 0.25 parts of monoglyceride stearate, mix at high speed and raise the temperature to 115°C, keep warm for 12 minutes to make it fully react;

[0060] (5) After cooling to 85°C, add 1 part of polyethylene wax, mix at high speed and...

Embodiment 3

[0066] (1) Commercially available ground calcium carbonate with a D50 particle size of 400 mesh is pulverized and classified by a jet mill to obtain unmodified ultrafine ground calcium carbonate powder with a particle size distribution range of D50=3.0 μm and D97=8.1 μm material;

[0067] (2) Place the unmodified superfine ground calcium carbonate powder in an oven at 110°C and dry to a moisture content of 0.22%;

[0068] (3) After cooling to 50°C, put 50 parts of dried ultrafine ground calcium carbonate powder in a high-speed mixer, add 1.0 parts of phosphate coupling agent, mix at high speed and heat up to 120°C, and keep warm for 10 minutes , to make it fully responsive;

[0069] (4) After cooling to 50°C, add 0.25 parts of aluminate coupling agent, mix at high speed and heat up to 120°C, keep it warm for 10 minutes to make it fully react;

[0070] (5) Cool to 100°C, then add 0.5 parts of calcium stearate, mix at high speed and heat up to 120°C, keep warm for 5 minutes to...

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Abstract

The invention provides a PE / CaCO3 breathable film masterbatch and a preparation method of the masterbatch. The masterbatch is characterized by comprising the following ingredients: 46-54 parts of superfine ground calcium carbonate, 0.25-1 part of modifier, 0.25-1 part of activator, 0.25-1 part of processing aid, 10-30 parts of linear low density polyethylene (LLDPE), 10-30 parts of metallocene catalyst low-density polyethylene (MLLDPE) and 10-20 parts of low-density polyethylene (LDPE). The preparation method adopts a double glass flow crushing and grading technology, a double surface modification technology and feeding through main and side feed ports; the particle size uniformity of superfine ground calcium carbonate powder and dispersion uniformity in a polyethene (PE) resin matrix aregreatly improved; and the tensile strength of the PE / CaCO3 breathable film masterbatch is obviously improved.

Description

technical field [0001] The present invention relates to a kind of PE / CaCO 3 The breathable film masterbatch and its preparation method belong to the technical field of high molecular polymer / inorganic rigid particle composite material processing. Background technique [0002] Breathable film is a kind of composite plastic film with microporous air-permeable structure, which is characterized by adding inorganic fillers (such as calcium carbonate, talcum powder, etc.) , so as to obtain a microporous composite film with small pore size and interpenetration. The micropores allow gas to pass through, while liquids with diameters larger than the micropores cannot pass through, thus giving this composite film the characteristics of "breathable and impervious to water". Breathable membranes are widely used in the fields of medical and health care, personal care products and food packaging, such as medical gloves, medical surgical gowns, disposable sheets, sanitary napkins, diapers,...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08K9/04C08K3/26C08J3/22
CPCC08J3/226C08J2323/06C08J2323/08C08J2423/06C08J2423/08C08K9/04C08K9/08C08K2003/265C08K2201/011
Inventor 蔡梦军王建强
Owner 池州市锐强新材料有限公司