Production method of steaming-grade CPP film

A production method and film technology, applied in the production field of cooking grade CPP film, can solve the problems of general impact resistance of semi-high temperature cooking film, inconvenient transportation and handling, high quality, etc., and achieve excellent chemical stability and low temperature insulation. Heat sealability, light weight, good stress crack resistance

Inactive Publication Date: 2015-05-27
ANHUI SONGTAI PACKAGING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary semi-high-temperature cooking film has average impact resistance, is easy to break, and has a large quality, which brings great inconvenience to transportation and handling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] To produce a film with a thickness of 25 μm, the following steps are used:

[0028] a) Weigh 20 parts of F800EDF PP to make the corona layer, 60 parts of F8001 PP to make the core layer, 19.28 parts of FL7623L PP, 0.64 parts of slip agent, and 0.08 parts of antistatic agent to make the heat seal layer, and mix them at high speed Mix in the machine for 3 minutes;

[0029] b) Plasticize the uniformly mixed material at 245°C;

[0030] c) The melt is attached to the cold roll by a high-pressure air knife and chilled in a water bath at 23-27°C to form a cast sheet;

[0031] d) Forming, using infrared system for thickness measurement feedback;

[0032] e) Perform corona spark treatment on the surface of the corona layer, so that the corona tension becomes 46mN / m, and then wind up at a speed of 60-70m / min;

[0033] f) Finally, ripen at 27-28°C for 48 hours.

Embodiment 2

[0035] To produce a film with a thickness of 30 μm, the following steps are used:

[0036] a) Weigh 20 parts of F800EDF PP to make the corona layer, 60 parts of F8001 PP to make the core layer, 19.28 parts of FL7623L PP, 0.5 parts of slippery agent, 0.22 parts of antistatic agent to make the heat seal layer, and mix them at high speed Mix in the machine for 3 minutes;

[0037] b) Plasticize the uniformly mixed material at 245°C;

[0038] c) The melt is attached to the cold roll by a high-pressure air knife and chilled in a water bath at 23-27°C to form a cast sheet;

[0039] d) Forming, using infrared system for thickness measurement feedback;

[0040] e) Perform corona spark treatment on the surface of the corona layer, so that the corona tension becomes 46mN / m, and then wind up at a speed of 60-70m / min;

[0041] f) Finally, ripen at 27-28°C for 48 hours.

Embodiment 3

[0043] To produce a film with a thickness of 35 μm, the following steps are used:

[0044] a) Weigh 20 parts of F800EDF PP to make the corona layer, 60 parts of F8001 PP to make the core layer, 19.28 parts of FL7623L PP, 0.5 parts of slippery agent, 0.22 parts of antistatic agent to make the heat seal layer, and mix them at high speed Mix in the machine for 3 minutes;

[0045] b) Plasticize the uniformly mixed material at 245°C;

[0046] c) The melt is attached to the cold roll by a high-pressure air knife and chilled in a water bath at 23-27°C to form a cast sheet;

[0047] d) Forming, using infrared system for thickness measurement feedback;

[0048] e) Perform corona spark treatment on the surface of the corona layer, so that the corona tension becomes 46mN / m, and then wind up at a speed of 60-70m / min;

[0049] f) Finally, ripen at 27-28°C for 48 hours.

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Abstract

The invention discloses a production method of a steaming-grade CPP film. The method comprises the following steps: (a) manufacturing a corona layer by weighing 19 to 21 parts of ternary polypropylene randon copolymer, manufacturing a core layer by weighing 59 to 61 parts of homo-polypropylene, manufacturing a heat seal layer by weighing 19 to 20 parts of ternary co-polypropylene, 0.5 to 0.64 part of a slipping agent and 0.08 to 0.22 part of anti-electrostatic agent, and mixing all raw materials for 3 minutes in a high-speed mixing machine; (b) plastically extruding the uniformly mixed materials at the temperature of 245 DEG C; (c) adhering a melt onto a cold roller by virtue of a high-pressure air knife, chilling the melt in a water bath at the temperature of 23 to 27 DEG C to form a cast sheet; (d) forming, and carrying out the thickness measurement feedback by utilizing an infrared system; (e) carrying out the corona spark treatment on the surface of the corona layer, enabling the corona tension to be 44 to 50 mN / m, and coiling the cast sheet at a speed of 60 to 70 m / min; (f) curing the cast sheet for 48 hours at the temperature of 27 to 28 DEG C. The product molded in the method is light in weight, resistant to impact, high in smoothness and clarity, resistant to abrasion, good in stress fracture resistance and excellent in chemical stability, insulation property and low-temperature heat seal property.

Description

technical field [0001] The invention belongs to the field of packaging material production, in particular to a production method of cooking grade CPP film. Background technique [0002] Retort packaging is one of the fastest-growing packaging categories in the past two years. High-temperature resistant retort food packaging bags (hereinafter referred to as retort-resistant bags), commonly known as soft cans, are most notable for their long-term storage at room temperature without spoilage; they are also very convenient to use, and can be eaten cold or cooked hot. At present, retort bags are mainly used for packaging canned food, cooked food, etc., and are also used for packaging beverages, juices, mashed potatoes, cereals, etc. in Japan and Western Europe. , to make a composite substrate film resistant to high temperature cooking and sterilization. Non-retortable grade refers to the film that cannot be used as the inner substrate of the retort pouch and can only be use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
Inventor 焦国平齐继业王延茂李鹏飞
Owner ANHUI SONGTAI PACKAGING MATERIALS
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