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Processing technology of curl-resistance PE cast film

A processing technology and casting film technology, which is applied in the processing technology field of anti-curling PE casting film, can solve the problems of poor flatness and poor curl resistance, and achieve fast production speed, good curl resistance and excellent balance performance in all directions Effect

Inactive Publication Date: 2020-04-17
常州唯尔福卫生用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to overcome the defects of poor curl resistance and poor flatness in the prior art, and provide a processing technology for curl-resistant PE cast film

Method used

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  • Processing technology of curl-resistance PE cast film

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Effect test

Embodiment 1

[0026] see figure 1 , a processing technology of anti-curling PE cast film, raw materials include high barrier material, composite material and bonding material, wherein the content of high barrier material is 60%, the content of composite material is 80%, the content of bonding material is 50%, and Dry and melt the selected materials. The high barrier material is PE material, and the composite material is composite grade CPP pellets, and its MI value is between 8. Firstly, the raw materials are selected, and the bonding material is bonding resin. When the value is 8, the bonding material is made of bonding resin, and its MI value is between 6. After the selection is completed, use a dryer to dry it, and then use a multi-component metering, weighing and feeding device to inject the raw materials into the extrusion In the machine, the high-barrier material, composite material and adhesive material are melted and extruded separately, and then the melt is filtered and layered and...

Embodiment 2

[0039] see figure 1, a processing technology of anti-curling PE cast film, raw materials include high barrier material, composite material and bonding material, wherein the content of high barrier material is 40%, the content of composite material is 60%, the content of bonding material is 30%, and The selected material is subjected to dry melting treatment, the high barrier material is PVDC material, the composite material is LDPE material, and its MI value is 4, and the bonding material is selected from bonding resin, and its MI value is between 2 After the selection is completed, dry it with a dryer, then use a multi-component metering and weighing feeding device to inject the raw materials into the extruder, and melt and extrude the high barrier material, composite material and bonding material respectively , and then filter the melt, and perform layered splitting treatment on it. Co-extrusion distributors, single-channel and multi-channel dies can be used to achieve split...

Embodiment 3

[0052] see figure 1 , a processing technology of anti-curling PE cast film, raw materials include high barrier material, composite material and bonding material, wherein the content of high barrier material is 50%, the content of composite material is 70%, the content of bonding material is 40%, and The selected material is subjected to dry melting treatment, the high barrier material is at least one of PE material, EVOH material and PVDC material, and the composite material is at least one of composite grade CPP pellets, cooking grade CPP material and LDPE material One, and its MI value is 6, and the bonding material is selected from bonding resin, and its MI value is 4.

[0053] A processing technology of anti-curling PE casting film, comprising the following steps:

[0054] (1), firstly select the raw material, after the selection is completed, dry it with a dryer, the drying temperature is 85°C, and the drying time is 25min;

[0055] (2), then use multi-component meterin...

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Abstract

The invention discloses a processing technology of a curl-resistance PE cast film. The cast film prepared by the technology has excellent optical performance and thickness uniformity, a very high production speed can be obtained due to adoption of a quenching roller, and the form structure of the film is improved; the curl-resistance property and flatness of the film can be effectively improved, the characteristics of good curl-resistance property, good flatness and the like are achieved, meanwhile, the advantages of high production speed, high yield and the like are achieved, large batch production is facilitated, the thickness control precision of products is high, meanwhile, the thickness uniformity is good, the transparency and glossiness are made excellent synchronously, the balance performance in all directions is outstanding, all layers of melt can be uniformly distributed after spreading on a die head, mutual mixing among all layers of materials can be prevented, the overall thickness can be monitored and adjusted, and the thickness of certain key functional layers can be monitored and adjusted.

Description

technical field [0001] The invention relates to the technical field of PE casting film processing, in particular to a processing technology of anti-curling PE casting film. Background technique [0002] PE cast film is a successfully developed plastic packaging material, and with the further improvement of PE cast film's barrier properties, fragrance retention, moisture resistance, oil resistance, retortability and heat sealing performance, it can be widely used in frozen meat products , Cooked meat food, convenience food, aquatic products, fruit, etc. solid packaging, as well as liquid packaging such as dairy products, edible oil, wine, soy sauce, etc., greatly extending the shelf life of commodities. However, the PE cast film produced in the PE cast film processing process will wrinkle and curl during the winding process, which greatly reduces its flatness and is inconvenient to use. Therefore, we propose an anti-curl Processing technology of PE cast film. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
CPCB29D7/01
Inventor 张宏辉章文忠夏志卿
Owner 常州唯尔福卫生用品有限公司
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