Ultrathin cast film as well as preparation method thereof and application thereof

A cast film and ultra-thin flow technology, which is applied in transportation and packaging, flexible coverings, packaging, etc., can solve the problems of low output per unit weight, thick thickness, and high cost, and achieve an increase in output per unit weight , Reduce production costs, reduce transportation costs

Inactive Publication Date: 2018-06-08
天津市德利塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of scientific and technological life, ultra-thin cast film tends to occupy the mainstream of the market, but the thickness of the cast film is reduced at the expense of its mechanical properties. In order to meet the requirements of use, the cast film currently on the market The thickness is generally 22-26g / m 2 Between, the thickness is thicker, the output rate per unit weight is low, and the cost is high

Method used

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  • Ultrathin cast film as well as preparation method thereof and application thereof
  • Ultrathin cast film as well as preparation method thereof and application thereof
  • Ultrathin cast film as well as preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Mixing and feeding: According to the predetermined weight, the raw material particles of the following components are stirred and mixed and then put into the extruder:

[0044] LDPE: 7Kg;

[0045] LLDPE: 20Kg;

[0046] HDPE: 30Kg;

[0047] MLLDPE: 3Kg;

[0048] PP: 1Kg;

[0049] Color masterbatch: 5Kg.

[0050] (2) Extrusion plasticization: heat up to 160°C at a heating rate of 40°C / h, keep for 20min, plasticize, and pressurize;

[0051] (3) Extrusion casting: the first step, connection: the temperature of the connection process is 190°C; the second step, filtration: the temperature of the filtration process is 250°C, the third step: casting: the temperature of casting is 220°C ;

[0052] (4) Calendering and shaping cooling: the temperature is set to 50°C for the rubber roller, 60°C for the embossed steel roll, and the pulling speed is 60m / min;

[0053] (6) corona treatment;

[0054] (7) Trimming and winding to obtain this ultra-thin cast film: the tension o...

Embodiment 2

[0056] (1) Mixing and feeding: According to the predetermined weight, the raw material particles of the following components are stirred and mixed and then put into the extruder:

[0057] LDPE: 12Kg;

[0058] LLDPE: 25Kg;

[0059] HDPE: 55Kg;

[0060] MLLDPE: 5Kg;

[0061] PP: 3Kg;

[0062] Color masterbatch: 8Kg.

[0063] (2) Extrusion plasticization: heat to 170°C at a heating rate of 50°C / h, keep for 30min, plasticize, and pressurize;

[0064] (3) Extrusion casting: the first step, connection: the temperature of the connection process is 210°C; the second step, filtration: the temperature of the filtration process is 270°C, the third step: casting: the temperature of casting is 230°C ;

[0065] (4) Calendering and shaping cooling: the temperature is set to 55°C for the rubber roller, 65°C for the embossed steel roll, and the pulling speed is 80m / min;

[0066] (6) corona treatment;

[0067] (7) Trimming and winding to obtain this ultra-thin cast film: the tension of ...

Embodiment 3

[0069] (1) Mixing and feeding: According to the predetermined weight, the raw material particles of the following components are stirred and mixed and then put into the extruder:

[0070] LDPE: 10Kg;

[0071] LLDPE: 22Kg;

[0072] HDPE: 40Kg;

[0073] MLLDPE: 4Kg;

[0074] PP: 2Kg;

[0075] Color masterbatch: 6Kg.

[0076] (2) Extrusion plasticization: heat to 165°C at a heating rate of 45°C / h, keep for 25min, plasticize, and pressurize;

[0077] (3) Extrusion casting: the first step, connection: the temperature of the connection process is 200°C; the second step, filtration: the temperature of the filtration process is 260°C, the third step: casting: the temperature of casting is 225°C ;

[0078] (4) Calendering and shaping cooling: the temperature is set to 52°C for the rubber roller, 62°C for the embossed steel roll, and the pulling speed is 80m / min;

[0079] (6) corona treatment;

[0080] (7) Trimming and winding to obtain this ultra-thin cast film: the tension of th...

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Abstract

The invention discloses an ultrathin cast film. According to the technical scheme, the key point isThe ultrathin cast film is characterized that the ultrathin cast filmby comprises comprising the following components: 7-12 parts of LDPE, 20-25 parts of LLDPE, 30-55 parts of HDPE, 3-5 parts of MLLDPE, 1-3 parts of PP and 5-8 parts of color master batch. The invention further discloses a preparation method for the ultrathin cast film, and the preparation method comprises the following steps: adding materials; performing extrusion plastifying; , extrusion casting, calendaring, setting and cooling; performing corona treatment; and trimming and rolling, wherein during calendaring, setting and cooling, the temperature of a rubber roller is set to be 50-55 DEG C, the temperature of an embossed steel stick is set to be 60-65 DEG C and pulling speed is 60-80 m / min. On the premise of keeping barrier properties, waterproof properties, softness, tensile properties and breakage properties of the cast film, the thickness of the cast film is reduced, the unit weight yield is increased, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of films, in particular to an ultra-thin casting film and its preparation and application. Background technique [0002] Cast film is a non-stretched, non-oriented flat film produced by melt casting and quenching. It is widely used in the packaging of daily necessities, food, medical supplies, textiles, and electronic products. Among them, in the field of daily necessities, cast film is widely used in the base film and envelope of sanitary napkins, the base film of adult nursing pads, and the base film of pet pads, which can effectively block liquid leakage. [0003] Existing reference publication number is the Chinese patent of CN707513197A, and it discloses a kind of waterproof air-permeable cast film composite material and preparation method thereof, is made of the following components by weight: metallocene polyethylene 42-47 parts, high pressure 3-8 parts of polyethylene, 45-55 parts of inorganic filler, 0.1-1 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/12C08J5/18B65D65/38
CPCB65D65/38C08J5/18C08J2323/06C08J2423/06C08J2423/08
Inventor 薄桂智
Owner 天津市德利塑料制品有限公司
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