PE (polyethylene) film and preparation method thereof
A film and film blowing machine technology, applied in the field of PE film and its preparation, can solve the problems of easy wrinkling, high cost, low tensile strength, etc., to reduce resource consumption, use less raw materials, and improve tensile strength Effect
Inactive Publication Date: 2013-04-03
SUZHOU TA&A ULTRA CLEAN TECH CO LTD
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Problems solved by technology
Among them, the density of LDPE film is about 0.92g / cm 2 Left and right, the thickness of the film is mostly less than 0.03mm. Although its transparency and heat sealability are good, its tensile strength is low, its tensile elongation is large, and it is easy to wrinkle
The density of HDPE film is 0.94g / cm 2 ~0.965g / cm 2 Among them, its heat resistance and tensile strength are better than LDPE film, but HDPE film is thicker and poor in transparency, generally above 0.03mm
Although it is possible to use new PE materials, such as cross-linked polyethylene, to make PE film products not only thinner, but also to meet the requirements of high tensile strength and low tensile elongation, but the cost is relatively high
Method used
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[0009] The present invention will be described below through specific examples. The given examples are only general illustrations of the present invention, which are helpful for a better understanding of the present invention, but do not limit the scope of the present invention. The materials described in the following examples can be obtained from commercial sources unless otherwise specified.
[0010] The PE film in this example is made from LDPE and HDPE, and the weight ratio of the LDPE to the HDPE is 100:10.
[0011] In the specific preparation process of the PE film of this embodiment, the dry density is 0.916g / cm 3 ~0.930g / cm 3 LDPE particles and density ≥ 0.96g / cm 3 The HDPE particles are added into the lower hopper of the film blowing machine according to the weight ratio of 100:10, and the PE film is obtained by blowing the film under the film blowing temperature condition of 145° C. to 175° C. Since the PE film of the present invention is prepared by using the ab...
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Abstract
The invention provides a PE (polyethylene) film which is prepared by using LDPE (low-density polyethylene) and HDPE (high-density polyethylene) as raw materials, wherein the LDPE / HDPE weight ratio is 100:10. The preparation method of the PE film comprises the following steps: adding PE particles having a density of 0.916-0.930 g / cm<3> and assistant particles having a density not lower than 0.96 g / cm<3> into a film blowing machine according to a weight ratio of 100:10; and performing film blowing at 145-175 DEG C to prepare the PE film. According to the invention, the PE film prepared by using the HDPE particles having a high density as the raw material is low in raw material consumption and cost; the consumption of resources is reduced; and the PE film is small in thickness and favorable in transparency and has satisfactory tensile strength.
Description
technical field [0001] The invention relates to a PE film and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] PE film, that is, polyethylene film, has the characteristics of moisture resistance and low moisture permeability. As a polymer material, it has been widely used in packaging and other fields. PE film is mainly divided into LDPE film (low density polyethylene film), MDPE film (medium density polyethylene film), HDPE film (high density polyethylene film) and CLPE film (cross-linked polyethylene film). Among them, the density of LDPE film is about 0.92g / cm 2 Left and right, the thickness of the film is mostly below 0.03mm. Although its transparency and heat sealability are good, its tensile strength is low, its tensile elongation is large, and it is easy to wrinkle. The density of HDPE film is 0.94g / cm 2 ~0.965g / cm 2 Among them, its heat resistance and tensile strength are better than LDPE film, but...
Claims
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IPC IPC(8): C08L23/06B29C55/28
Inventor 葛开友裴骏
Owner SUZHOU TA&A ULTRA CLEAN TECH CO LTD