Polyolefin thermal shrinkage film and preparation method thereof

A polyolefin heat shrinkable film technology, applied in chemical instruments and methods, flexible coverings, packaging, etc., can solve the problem of product packaging that cannot meet the high shrinkage rate, polyolefin heat shrinkable film has a narrow application range, and a narrow heat shrinkage range and other problems, to achieve good heat shrinkage performance, flexible hand feeling, and improve the effect of heat shrinkage rate

Active Publication Date: 2019-10-18
GUANGDONG ANDELI NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a preparation method of polyolefin heat-shrinkable film, aiming to solve the problem that the existing polyolefin heat-shrinkable film (P

Method used

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  • Polyolefin thermal shrinkage film and preparation method thereof
  • Polyolefin thermal shrinkage film and preparation method thereof
  • Polyolefin thermal shrinkage film and preparation method thereof

Examples

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Example Embodiment

[0028] The present invention provides a method for preparing polyolefin heat shrinkable film.

[0029] Reference figure 1 , figure 1 It is a schematic flow chart of an embodiment of the preparation method of the polyolefin heat shrinkable film provided by the present invention.

[0030] In an embodiment of the present invention, a method for preparing a polyolefin heat shrinkable film includes the following steps:

[0031] Add the raw materials of the outer layer, the middle layer and the inner layer, and obtain the composite material after melting and co-extrusion;

[0032] The composite material is inflated once to form a film bubble, and the film tube is obtained by cooling and shaping after the size is stable;

[0033] After removing the water, the film tube is drawn to the heating system for pre-heating. When it is heated to 85-110°C, it will be inflated for a second time and biaxial stretching will start;

[0034] The stretched film tube is cooled and shaped by an air ring, and the...

Example Embodiment

[0048] Example 1

[0049] (1) Raw material mixing:

[0050] The polyolefin heat shrinkable film of this embodiment is divided into 5 layers, namely A / B / C / D / E, where the middle layer includes the B / C / D layer, and the 5 layers of raw materials are mixed uniformly according to the weight percentage. The average thickness ratio is 3 / 3 / 3 / 3 / 3. The raw material composition of each layer of A / B / C / D / E is as follows:

[0051] The composition of the A layer and the E layer is the same. Both the A layer and the E layer are composed of the following weight percentages of raw materials: 50% ternary copolymer polypropylene, 42% binary copolymer polypropylene, 3% silicone anti-blocking agent, 1% erucamide slip agent and 4% lauric acid diethanolamine antistatic agent.

[0052] The composition of the B layer and the D layer is the same. Both the B layer and the D layer are composed of the following raw materials in weight percentage: 40% linear low density polyethylene, 50% metallocene linear low dens...

Example Embodiment

[0066] Example 2

[0067] (1) Raw material mixing:

[0068] The polyolefin heat shrinkable film of this embodiment is divided into 5 layers, namely A / B / C / D / E, where the middle layer includes the B / C / D layer, and the 5 layers of raw materials are mixed uniformly according to the weight percentage. The average thickness ratio is 3 / 3 / 3 / 3 / 3. The raw material composition of each layer of A / B / C / D / E is as follows:

[0069] The composition of the A layer and the E layer are the same. Both the A layer and the E layer are composed of the following weight percentages of raw materials: 45% ternary copolymer polypropylene, 50% polypropylene-based elastomer, 1% silica anti-blocking agent , 2% oleic acid amide slip agent and 2% lauric acid diethanolamine antistatic agent.

[0070] The composition of the B layer and the D layer is the same. Both the B layer and the D layer are composed of the following weight percentages of raw materials: 30% linear low density polyethylene, 55% metallocene linear l...

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Abstract

The invention discloses a preparation method of a polyolefin thermal shrinkage film. The preparation method of the polyolefin thermal shrinkage film comprises the following steps that raw materials ofan outer layer, an intermediate layer, and an inner layer are added and subjected to melting co-extrusion to obtain a composite material; the composite material is subjected to a primary inflation toform a film bubble, and after the dimension is stable, a film tube is obtained after cooling shaping is conducted; the dehydrated film tube is pulled to a heating system for preheating to 85 to 110 DEG C, and a secondary inflation is started while bidirectionalstretching is conducted; the stretched film tube is subjected to heat shaping treatment after being cooled and shaped through a vane, andthe polyolefin thermal shrinkage film is obtained through trimming and rolling. The polyolefin thermal shrinkage film is good in thermal shrinkage performance within the temperature range of 80 to 110DEG C, the thermal shrinkage rate is controllable within the range from 40% to 70%, and the hand feeling is relatively flexible.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a polyolefin heat-shrinkable film and a preparation method thereof. Background technique [0002] With the continuous development of my country's economic development level, packaging products can be widely used in daily chemicals, medicine and agricultural by-products, and biaxially oriented polyolefin shrink film (POF) as one of the packaging materials, compared with traditional wood, Packaging materials such as paper, metal, glass and polyvinyl chloride heat shrinkable film (PVC heat shrinkable film) have the advantages of light weight, good transparency, non-toxic, green environmental protection, and convenient use. They are widely used in food, medicine, and daily necessities. , Electronic appliances, pharmaceutical industry and other fields of product packaging and transportation. [0003] The traditional biaxially oriented polyolefin shrink film (POF) uses linea...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/06B32B27/32B32B27/18B65D65/40C08L23/14C08L83/04C08L23/08C08L23/06C08K5/20C08K5/17C08J5/18B29C61/08
CPCB29C61/08B32B27/08B32B27/18B32B27/32B32B27/327B32B2307/31B32B2307/406B32B2307/54B65D65/40C08J5/18C08J2323/06C08J2323/08C08J2323/14C08J2423/08C08J2423/14C08K5/17C08K5/20
Inventor 陈捷新吴淑芬苏阳张春生王丹旭
Owner GUANGDONG ANDELI NEW MATERIALS CO LTD
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