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Anti-aging polyolefin heat-shrinkable film preparation method

A polyolefin heat shrinkable film technology, applied in the direction of chemical instruments and methods, flat products, applications, etc., can solve the problems of reduced sealing strength, film aging, etc., and achieve the effect of avoiding the reduction of sealing strength

Active Publication Date: 2020-04-28
上海森韦得实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some products packaged by polyolefin heat shrinkable film need to be stored outdoors. Under the action of light and oxygen, the molecular chain of polyolefin heat shrinkable film will be partially (broken) degraded, and the film will age, resulting in a decrease in sealing strength.

Method used

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  • Anti-aging polyolefin heat-shrinkable film preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) The mass fraction is 95% linear low-density polyethylene LLDPE (purchased from Dow Company in the United States, the model is DOWLEX2045, the density is 0.918~0.935g / cm), 3% slip agent (LDPE, erucamide and oil A mixture of acid amides, wherein the effective content of amides is 7%, the mass fraction ratio of oleic acid amide and erucic acid amide is 1.5:1) and 2% anti-UV additive (KZPP04, purchased from Schulman company) by vacuum suction The method is added to a single-screw extruder for melting, the screw speed of the single-screw extruder is 115r / min, and the melting is sufficient at 200°C.

[0022] (2) 96% ternary copolymerized polypropylene TPP (FS6612L finished product of Singapore TPC), 2% opening agent (low density polyethylene LDPE (C 2 h 4 )n and silicon dioxide SiO 2 Mixture, silicon dioxide effective content is 20%) and 2% anti-UV additive (KZPP04, purchased from Schulman company) joins in another single-screw screw by the mode of vacuum suction and me...

Embodiment 2

[0025] (1) The mass fraction is 95% linear low-density polyethylene LLDPE (purchased from Dow Company in the United States, the model is DOWLEX2045, the density is 0.918~0.935g / cm), 3% slip agent (LDPE, erucamide and oil A mixture of acid amides, wherein the effective content of amides is 7%, the mass fraction ratio of oleic acid amide and erucic acid amide is 1:1) and 2% anti-UV additive (KZPP04, purchased from Schulman company) through vacuum suction The method is added to a single-screw extruder for melting, the screw speed of the single-screw extruder is 115r / min, and the melting is sufficient at 190°C.

[0026] (2) 96% ternary copolymerized polypropylene TPP (FS6612L finished product of Singapore TPC), 2% opening agent (low density polyethylene LDPE (C 2 h 4 )n and silicon dioxide SiO 2 Mixture, silicon dioxide effective content is 20%) and 2% anti-UV additive (KZPP04, purchased from Schulman company) joins in another single-screw screw by the mode of vacuum suction and...

Embodiment 3

[0029] (1) The mass fraction is 95% linear low-density polyethylene LLDPE (purchased from Dow Company in the United States, the model is DOWLEX2045, the density is 0.918~0.935g / cm), 3% slip agent (LDPE, erucamide and oil A mixture of acid amides, wherein the effective content of amides is 7%, the mass fraction ratio of oleic acid amide and erucic acid amide is 1.2:1) and 2% anti-UV additive (KZPP04, purchased from Schulman company) by vacuum suction The method is added to a single-screw extruder for melting, the screw speed of the single-screw extruder is 115r / min, and the melting is sufficient at 200°C.

[0030] (2) 96% ternary copolymerized polypropylene TPP (FS6612L finished product of Singapore TPC), 2% opening agent (low density polyethylene LDPE (C 2 h 4 )n and silicon dioxide SiO 2 Mixture, silicon dioxide effective content is 20%) and 2% anti-UV additive (KZPP04, purchased from Schulman company) joins in another single-screw screw by the mode of vacuum suction and me...

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Abstract

The invention discloses an anti-aging polyolefin heat-shrinkable film preparation method. The anti-aging polyolefin heat-shrinkable film preparation method comprises the following steps that a first supply molten material flow is prepared by melting linear low-density polyethylene LLDPE, a slipping agent and an anti-UV additive; a second supply molten material flow is prepared by melting terpolymer polypropylene TPP, an anti-blocking agent and an anti-UV additive; the first supply molten material flow and the second supply molten material flow are extruded through a co-extrusion die head; water-cooling shaping, secondary traction after traction, heating, air-cooling shaping after blowing, bubble stopping flattening, and winding finishing are performed; and wherein the material flow supplyratio of the first supply molten material flow to the second supply molten material flow is (1-5): (1-5). According to a product packaged by the heat-shrinkable film, aging is retarded when the product needs to be stored outdoors, and the phenomena that the sealing strength is reduced and a sealed opening opens in the carrying process are avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of an anti-aging polyolefin heat-shrinkable film. Background technique [0002] The polyolefin heat-shrinkable film is heat-shrinkable by using a packaging machine to heat-cut, seal and heat-shrink the film. Some products packaged by polyolefin heat-shrinkable film need to be stored outdoors. Under the action of light and oxygen, the molecular chain of polyolefin heat-shrinkable film will be partially (broken) degraded, and the film will age, resulting in a decrease in sealing strength. When the packaged product is a heavy product, the seal will crack during the handling process. Based on this, the anti-aging polyolefin heat shrinkable film was developed. Contents of the invention [0003] The purpose of this section is to outline some aspects of embodiments of the invention and briefly describe some preferred embodiments. Some simpl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/00B29C48/18B29C48/395B29C48/49B29C48/92B29C55/28B29C55/00B32B27/08B32B27/32B32B27/20B29K23/00B29L7/00
CPCB29C48/0018B29C48/18B29C48/395B29C48/49B29C48/92B29C55/28B29C55/005B32B27/08B32B27/32B32B27/20B32B2307/552B32B2307/54B29C2948/9258B29C2948/92704B29K2023/0625B29K2023/12B29L2007/00
Inventor 傅文光
Owner 上海森韦得实业有限公司