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A kind of biaxially stretched polymer film and its preparation method and application

A polymer film, biaxial stretching technology, used in chemical instruments and methods, synthetic resin layered products, lamination, etc. -30°C, complex preparation methods, etc., to achieve the effects of dimensional stability, structural stability, and good flexibility

Active Publication Date: 2017-12-19
GUANGDONG ZHONGKE HUATONG NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Publication number CN105235336A discloses a low temperature resistant biaxially stretched polypropylene film and its manufacturing process. The polypropylene film is composed of a low temperature resistant anti-adhesion layer, a low temperature resistant core layer and a low temperature corona treatment layer from outside to inside, wherein The low temperature resistant core layer is made of 30-70% homopolypropylene, 10-40% thermoplastic elastic masterbatch, and 20-50% low-temperature resistant masterbatch. It is made of 50-70% of copolymerized modified polypropylene, 25-40% of low-temperature-resistant masterbatch, and 2-10% of silicon dioxide anti-blocking agent. The preparation method of the present invention is complicated, and the low-temperature resistance can only reach -30°C
[0010] The BOPP film in the above prior art has high tensile strength and good transparency, but low temperature resistance, tear resistance and stiffness cannot meet the existing requirements. With the development of high-end applications, the domestic demand for BOPP film will continue to increase, and at the same time, higher requirements will be put forward for its product quality
At present, the thickness range of domestic BOPP films is usually less than 50um, and the current technology is usually difficult to prepare thick films with a thickness exceeding 50um
Moreover, 80% of domestic BOPP film special materials still rely on imports, and many special films still need to be imported

Method used

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  • A kind of biaxially stretched polymer film and its preparation method and application
  • A kind of biaxially stretched polymer film and its preparation method and application
  • A kind of biaxially stretched polymer film and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0074] (1) The raw material of base film layer is put into extruder, wherein said raw material contains polypropylene 75%, silica 12%, butadiene-styrene random copolymer 8%, matting agent two Silicon oxide 5%, wherein the temperature of the extruder is 150 ° C; the raw material of the adhesive film layer is put into an auxiliary extruder, and the extrusion temperature is 200 ° C;

[0075] (2) The above raw materials are extruded after being melted and plasticized, and flow through a T-shaped die to form a composite layer co-extruded thick sheet. The working temperature of the die is 180°C, and the obtained thick sheet is cooled and formed by a cooling roller and a water tank. The temperature of the cooling roll and the water tank is 20°C;

[0076] (3) Preheat the above slab with a heating roller at a temperature of 1000° C., stretch it longitudinally by 5 times, and stretch it transversely at a temperature of 180° C. and stretch it 6 times;

[0077] (4) After double-sided cor...

Embodiment 2

[0080] (1) The raw material of base film layer is put into extruder, wherein said raw material contains polypropylene 80% by mass percentage, glass microsphere 12%, butadiene-styrene random copolymer 8%, wherein The temperature of the extruder is 180°C; the raw material of the adhesive film layer is put into an auxiliary extruder, and the extrusion temperature is 250°C;

[0081] (2) The above raw materials are extruded after being melted and plasticized, and flow through a T-shaped die to form a composite layer co-extruded thick sheet. The working temperature of the die is 200°C, and the obtained thick sheet is cooled and formed by a cooling roller and a water tank. The temperature of the cooling roll and the water tank is 30°C;

[0082] (3) Preheat the above slab with a heating roller at a temperature of 150° C., stretch it longitudinally by 6 times, and stretch it transversely at a temperature of 200° C. and stretch it 9 times;

[0083] (4) After corona treatment on one sid...

Embodiment 3

[0086] (1) Put the raw material of base film layer into the extruder, wherein said raw material contains ethylene propylene copolymer 85% by mass percentage, nano silicon dioxide 2%, vinyl chloride-vinyl acetate copolymer 8%, extinction 5% silicon dioxide, wherein the temperature of the extruder is 250°C; the raw material of the adhesive film layer is put into an auxiliary extruder, and the extrusion temperature is 300°C;

[0087] (2) The above-mentioned raw materials are extruded after being melted and plasticized, and flow through a T-shaped die to form a composite layer co-extruded thick sheet. The working temperature of the die is 250°C, and the obtained thick sheet is cooled and formed by a cooling roller and a water tank. The temperature of the cooling roll and the water tank is 20°C;

[0088] (3) Preheat the above slab with a heating roller at a temperature of 200° C., stretch it longitudinally by 8 times, and stretch it transversely at a temperature of 200° C. and stre...

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Abstract

A biaxially oriented polymer film and a preparation method therefor. A polymer film comprises a base film layer formed by an olefin polymer, and a superficial film layer formed by multi-polymerized polyolefin. The base film layer is an intermediate layer of the polymer film; a crystal face 110 of a crystal α of the polymer film has orientations in two directions, i.e., the direction of the equator and the direction of the meridian, the long period of lamellar crystals in the direction of the equator being 28-42, the long period of lamellar crystals in the direction of the meridian being 37-46; preferentially, the melting point of the multi-polymerized polyolefin of the superficial film layer is smaller than that of the olefin polymer of the base film layer. The polymer film features properties such as high transparency, high rigidity, tear resistance, low temperature resistance, and a stable size.

Description

technical field [0001] The invention belongs to the field of polymer films, in particular to a biaxially stretched polymer film and its preparation method and application. Background technique [0002] Biaxially oriented polypropylene (BOPP) film has the advantages of light weight, transparency, non-toxicity, moisture resistance, low air permeability, high mechanical strength, etc. It is widely used in the packaging of food, medicine, daily light industry, cigarettes and other products, and is widely used substrate for composite membranes. Since the industrial production of polypropylene (PP) resin in 1957, companies around the world have been competing to develop BOPP films. In 1958, Italy’s Montecatini company pioneered BOPP film production technology. In 1959 and 1962, Europe, America and Japan began to produce one after another. At present, BOPP film is the year of the world. The production capacity has reached 2.82 million tons, and the annual output exceeds 1.55 milli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/06B32B27/18B32B7/10B32B33/00B32B37/15B29C55/14
CPCB29C55/14B32B7/10B32B27/06B32B27/18B32B27/32B32B33/00B32B37/15
Inventor 董侠王笃金王峰阳明书赵莹周勇张建伟张德清
Owner GUANGDONG ZHONGKE HUATONG NEW MATERIALS TECH CO LTD
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