Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or sheets
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J3/00—Processes of treating or compounding macromolecular substances
  • C08J3/20—Compounding polymers with additives, e.g. colouring
  • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/05—Alcohols; Metal alcoholates
  • C08K5/053—Polyhydroxylic alcohols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
  • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
  • C08J2323/04—Homopolymers or copolymers of ethene
  • C08J2323/06—Polyethene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
  • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
  • C08J2323/10—Homopolymers or copolymers of propene
  • C08J2323/12—Polypropene

Definitions

• the present invention relates to a gas permeable masterbatch, and more particularly to a process for producing a water vapor permeable film using the gas permeable masterbatch. Background technique
• the gas permeable membrane is a film made of polymer materials through a specific production process technology with tens of thousands of micropores (apertures of a few micrometers to several tens of micrometers), which is characterized by gas permeable and watertight, which allows water Gases such as steam and air pass, but liquids are not allowed to pass.
• breathable films have been widely used in personal hygiene products such as baby diapers, medical clothing, medical gauze, breathable tarpaulin, raincoat, food packaging, crop preservation, and building waterproofing.
• the common production method of gas permeable membrane is to add a certain proportion of inorganic fillers such as calcium carbonate and talc to the polymer, and then extruding into a sheet/film through a screw, and then stretching in the transverse direction and the longitudinal direction during the stretching process.
• inorganic fillers such as calcium carbonate and talc
• the binding force of the inorganic filler to the surrounding polymer is less than the polymer deformation force caused by the stretching, the polymer is separated along the edge of the inorganic filler particles, thereby generating micropores, the size and morphology of the micropores and the inorganic filler.
• the particle size, shape and stretching method, stretching ratio and other process conditions are related, the influence parameters are large, the probability of error is large, the controllability of the micropore size is low, the defective product rate is high, and the production is increased.
• the technical problem to be solved by the present invention is to provide a gas permeable masterbatch which does not contain an inorganic filler, and the composition thereof comprises 90% to 95% of polyolefin and 5% to 10% of water-soluble organic matter.
• the polyolefin and the water-soluble organic matter are put into a mixer and blended in proportion, and the internal speed of the mixer is
• the temperature is 150 ⁇ 170 °C; the finished blended material is extruded and granulated to obtain waterproof and breathable functional masterbatch, the extruder speed is 20 ⁇ 50 rev / min, the temperature is 130 °C ⁇ 180°C.
• the polyolefin is polyethylene or polypropylene, and the water-soluble organic substance is ethylene glycol, glycerin or lactic acid.
• the invention also provides a method for manufacturing a water-permeable gas permeable membrane, which is manufactured by a new process and will be breathable After the masterbatch is cast into a film, the water-soluble organic matter therein is dissolved by water vapor, and the water-soluble organic matter uniformly distributed on the cast film is dissolved to leave pores which can block the passage of air and block the water molecule group, thereby A water-permeable and breathable film is produced, and the steps of the method include:
• the temperature of the casting machine barrel is 200 to 220 ° C
• the temperature of the die is 225 ° C to 235 ° C
• the linear speed of the casting machine is 85 to 95 m / min.
• the process reduces the influence of the stretching process of the conventional gas permeable membrane.
• the stretching temperature is too low, the molecular chain is difficult to move. At this time, the stretching is forced by the external force, and the structure of the gas permeable membrane is destroyed, so that the strength of the gas permeable membrane is lowered;
• the temperature is too high, the gas permeable membrane is excessively softened, and cracks are easily generated, which affects the water barrier effect.
• the ethylene glycol, glycerol or lactic acid Since the ethylene glycol, glycerol or lactic acid has a small molecular weight, it can be cast and stretched after being sufficiently dispersed into a master batch, so that it can be uniformly distributed in the cast film, and the cast film can be drawn to the steam.
• water vapor is used to dissolve the water-soluble organic matter to form micropores which are smaller than the water molecule agglomerate and larger than air or water vapor molecules, thereby achieving the functions of gas permeable and waterproof.
• the gas permeable membrane prepared by the above method is subjected to porosity detection, and the detection formula is:
• ⁇ Ll3 ⁇ 4 ( pt _ pt I ⁇ t X 100%)
• the porosity of the gas permeable membrane obtained by the invention is 32% to 36%
• the air permeability is 2800 ⁇ 3100g/square/24 hours
• the hydrostatic pressure is 1.6 ⁇ 1.8 meters.
• the parameters affecting the effect of the water-permeable gas permeable membrane are greatly reduced, the stretching process is reduced, the controllability of the gas permeability and the like is increased, the product defect rate is lowered, the product quality is improved, and the waste product is reduced.
• the production cost is saved, and there is no problem that the inorganic filler particles and the edge of the polymer are combined, which can effectively extend the service life of the product.
• Figure 1 is a flow chart of the production process of the present invention.
• Polyethylene and ethylene glycol were put into an internal mixer according to the above ratio, and the temperature of the internal mixer was 150 ° C. After mixing for 5 minutes, the mixture was granulated by a twin-screw extruder to obtain a gas permeable master batch, and extruded.
• the machine speed is 30 rpm
• the temperature is 130 ° C, 140 ° C, 150 ° C, 150 ° C, 155 ° C, 160 ° C.
• the prepared gas permeable masterbatch is cast into a film, the casting machine barrel temperature is 250 ° C, the die temperature is 260 ° C, the casting machine linear velocity is 85 m / min, and the obtained cast film is cooled.
• Stereotype winding The wound film was taken up in a steam hot water tank for 2 minutes, the water-soluble organic matter in the film was dissolved, and the obtained water-permeable gas-permeable film was dried and wound up.
• the polypropylene and the lactic acid are put into an internal mixer according to the above ratio, the temperature of the internal mixer is 180 ° C, and after 10 minutes of mixing, the extrusion granulation is performed by a twin-screw extruder to obtain a gas permeable master batch, and the extruder speed is obtained. 50 rpm, temperature 150 ° C, 160 ° C, 170 ° C, 165 ° C, 175 V, 180 ° C.
• the prepared gas permeable masterbatch is cast into a film, the temperature of the casting machine barrel is 260 ° C, the temperature of the die is 280 ° C, the linear speed of the casting machine is 95 m / min, and the obtained cast film is cooled. Stereotype winding. The wound film was taken up in a steam hot water tank for 5 minutes, the water-soluble organic matter in the film was dissolved, and the obtained water-permeable gas-permeable film was dried and wound up.
• Polyethylene and glycerol were put into the mixer at the above ratio, and the temperature of the internal mixer was 160 ° C.
• extrusion granulation was carried out by a twin-screw extruder to obtain a gas permeable master batch.
• the extruder was rotated at 40 rpm, and the temperature was 130 ° C, 140 ° C, 150 ° C, 155 ° C, 160 °. C, 160 ° C.
• the prepared gas permeable masterbatch is cast into a film, the temperature of the casting machine barrel is 250 ° C, the temperature of the die is 260 ° C, the linear speed of the casting machine is 90 m / min, and the obtained cast film is cooled. Stereotype winding.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Moulding By Coating Moulds (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)

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• 2012
  • 2012-12-28 CN CN201210579169.8A patent/CN103030863B/zh active Active
• 2013
  • 2013-12-13 WO PCT/CN2013/089321 patent/WO2014101670A1/zh active Application Filing
  • 2013-12-13 RU RU2014142607/04A patent/RU2593590C2/ru active

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