High-strength polypropylene packaging bag and preparation method thereof

A polypropylene and high-strength technology, which is applied in the field of high-strength polypropylene packaging bags and its preparation, can solve the problems of low tensile strength and low notched impact strength, and achieve simple raw materials, good notch impact resistance, and simple preparation methods Effect

Inactive Publication Date: 2015-07-22
SUZHOU DINGLI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a high-strength polypropylene packaging bag with high notched impact strength and high tensile strength and a preparation method thereof, which solves the technical problems of low notched impact strength and low tensile strength of existing packaging bags

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1: Weigh 100 parts of polypropylene, 0.2 part of silane coupling agent, 45 parts of glass fiber, 0.2 part of white oil, 15 parts of LDPE, 0.1 part of antioxidant 1010, and 0.04 part of DCP according to the ratio of parts by mass. 2 parts of calcium stearate, 1 part of calcium carbonate, 1 part of POE.

[0022] Step 2: Put all the raw materials into a high-speed mixer and mix evenly. The temperature of the mixer is 90°C, and mix for 10-20 minutes.

[0023] The third step: put the mixed material into the twin-screw extruder, the temperature of the extruder is 120°C, 160°C, 180°C, 220°C, 260°C, the temperature of the head is 250°C, the speed of the extruder is 10r / min, L / D is 18, the stretching ratio is 8 times, and the water temperature of the cooling water tank is 20°C.

[0024] The tensile strength of the product is 220MPa, the elongation at break is 500%; the Vicat softening point is 125°C, the bending strength is 25MPa, and the notched impact strength is 65kJ / m...

Embodiment 2

[0026] Step 1: Weigh 100 parts of polypropylene, 0.6 part of silane coupling agent, 65 parts of glass fiber, 0.8 part of white oil, 35 parts of LDPE, 0.5 part of antioxidant 1010, and 0.08 part of DCP according to the ratio of parts by mass. 6 parts of calcium stearate, 2 parts of calcium carbonate, 20 parts of POE.

[0027] The second step: Put all the raw materials into a high-speed mixer and mix evenly. The temperature of the mixer is 100°C, and mix for 20 minutes.

[0028] The third step: put the mixed material into the twin-screw extruder, the temperature of the extruder is 160°C, 180°C, 220°C, 260°C, 280°C, the temperature of the head is 280°C, the speed of the extruder is 14r / min, L / D is 22, the stretching ratio is 10 times, and the water temperature of the cooling water tank is 40°C.

[0029]The tensile strength of the product is 230MPa, the elongation at break is 600%; the Vicat softening point is 130°C, the bending strength is 30MPa, and the notched impact strength...

Embodiment 3

[0031] Step 1: Weigh 100 parts of polypropylene, 0.3 parts of titanate coupling agent, 50 parts of glass fiber, 0.4 parts of white oil, 20 parts of LDPE, 0.2 parts of antioxidant 1010, and 0.05 parts of DCP according to the ratio of parts by mass. 3 parts, 3 parts of calcium stearate, 1.2 parts of calcium carbonate, 5 parts of POE.

[0032] The second step: Put all the raw materials into a high-speed mixer and mix evenly. The temperature of the mixer is 90°C, and mix for 10 minutes.

[0033] The third step: put the mixed material into the twin-screw extruder, the temperature of the extruder is 120°C, 160°C, 180°C, 220°C, 260°C, the temperature of the head is 250°C, the speed of the extruder is 10r / min, L / D is 18, the stretching ratio is 8 times, and the water temperature of the cooling water tank is 20°C.

[0034] The tensile strength of the product is 240MPa, the elongation at break is 700%; the Vicat softening point is 135°C, the bending strength is 35MPa, and the notched ...

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Abstract

The invention discloses a high-strength polypropylene packaging bag and a preparation method thereof. The high-strength polypropylene packaging bag comprises the following raw materials: polypropylene, a coupling agent, glass fibers, white oil, LDPE, an antioxidant 1010, DCP, calcium stearate, calcium carbonate and POE. The high-strength polypropylene packaging bag has high notch impact resistant strength, the tensile strength is 220-260 MPa, and the breaking elongation rate is 500-900%; the Vicat softening point is 125-145 DEG C, and the bending strength is 25-45 MPa; the high-strength polypropylene packaging bag is resistant to heat and corrosion, the raw materials are simple and easy to obtain, the preparation method is simple, and the notch impact strength is 65-75 kJ / m2, so that the high-strength polypropylene packaging bag can be widely produced and continuously used for replacing the existing materials.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-strength polypropylene packing bag and a preparation method thereof. Background technique [0002] High-strength polypropylene plastic raw material, chemical name: polypropylene, characteristics: low density, strength, stiffness, hardness and heat resistance are better than low-pressure polyethylene, and can be used at about 100 degrees. It has good electrical properties and high-frequency insulation and is not affected by humidity, but it becomes brittle at low temperature, not wear-resistant, and is easy to age. It is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. From the market point of view, the total annual domestic demand for polypropylene is more than 3.5 million tons, of which more than 1 million tons are dedicated to polypropylene. The demand for graft modified polypropylene is calculated at 100,000 to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L91/06C08L23/08C08K13/04C08K7/14C08K5/134C08K5/14C08K5/098C08K3/26B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/9258B29C2948/92704C08L2201/08C08L2205/035C08L2207/066C08L91/06C08L23/06C08L23/0815C08K13/04C08K7/14C08K5/14C08K5/098C08K2003/265
Inventor 顾建芳
Owner SUZHOU DINGLI PACKAGING
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