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Low-permeability and high-strength film and preparation method of the same

A gas-permeable, high-strength technology, applied in the treatment of dyed polymer organic compounds, dyed organic silicon compounds, etc., can solve the problems of unsatisfactory mechanical properties of the gas-permeable film, to ensure uniform gas permeability, ensure comprehensive mechanical properties, The effect of excellent tensile strength

Active Publication Date: 2015-04-08
SHANGHAI ZIHUA FILM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a low-air-permeable high-strength film. The low-air-permeable high-strength film will solve the unsatisfactory mechanical properties of the low-air-permeable film in the prior art question

Method used

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  • Low-permeability and high-strength film and preparation method of the same
  • Low-permeability and high-strength film and preparation method of the same
  • Low-permeability and high-strength film and preparation method of the same

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Embodiment 1

[0041] The above-mentioned process is used to prepare a low-breathability high-strength film, and the polyethylene raw material is as described in the embodiment: 50% of CaCO with a particle size of 0.5-10 μm 3 After the surface is modified by polymerization and treated with a silane coupling agent, it is filled with LDPE, LLDPE, mLLDPE, HDPE (mass percentage 20:30:10:40) multi-component blended polyolefin system for extrusion granulation, and the raw material particles are extruded through the extrusion flow It is extruded into film by extension process, the stretching ratio is 1.65, and the weight of the film material is 35gsm.

Embodiment 2

[0043] The low air permeability high-strength film is prepared by the above-mentioned process, and the polyethylene raw material is as described in the embodiment: 50% CaCO with a particle size of 0.5-10 μm 3 After the surface is modified by polymerization and treated with a silane coupling agent, it is filled with LDPE, LLDPE, mLLDPE, HDPE (mass percentage 20:30:10:40) multi-component blended polyolefin system for extrusion granulation, and the raw material particles are extruded through the extrusion flow It is extruded into film by extension process, the stretching ratio is 1.7, and the weight of the film material is 35gsm.

Embodiment 3

[0045] The low air permeability high-strength film is prepared by the above-mentioned process, and the polyethylene raw material is as described in the embodiment: 50% CaCO with a particle size of 0.5-10 μm 3 After the surface is modified by polymerization and treated with a silane coupling agent, it is filled with LDPE, LLDPE, mLLDPE, HDPE (mass percentage 20:30:10:40) multi-component blended polyolefin system for extrusion granulation, and the raw material particles are extruded through the extrusion flow It is extruded into film by extension process, the stretching ratio is 1.6, and the weight of film material is 35gsm.

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Abstract

The invention discloses a low-permeability and high-strength film, and further discloses a preparation method of the low-permeability and high-strength film. The low-permeability and high-strength film comprises a high polymer film base body. The high polymer film base body comprises low-density polyethylene, linear low-density polyethylene, metallocene linear low-density polyethylene and high density polyethylene, wherein the mass ratio of the low-density polyethylene, linear low-density polyethylene, the metallocene linear low-density polyethylene and the high density polyethylene is (15-25):(25-35):(5-15):(35-45). Inorganic filler is further filled in the high polymer film base body. The mass ratio of the high polymer film base body and the inorganic filler is 1:(0.8-1.2). The preparation method of the low-permeability and high-strength film comprises one step that the surface of the inorganic filler is processed and a step that pelleting is extruded in a melt mode, and modified particles are extruded out, coated in a curtain mode, stretched, heat-set and formed. The low-permeability and high-strength film has outstanding low-permeability, low- moisture-penetrability and good tensile mechanical property, and meanwhile has good heat sealability and puncture resistance and toughness, and can be widely applied to permeable packaging of disposable heating appliances.

Description

Technical field: [0001] The invention relates to the field of chemical industry, in particular to the processing technology of a breathable microporous film, in particular to a film with low air permeability and high strength and a preparation method thereof. Background technique: [0002] Breathable film is a new type of film material. It is formed by adding an incompatible inorganic particle porogen into the polymer, stretching after film formation. There are many capillary-like micropores in its structure, and these micropores constitute channels that allow gas molecules to pass through, but the diameter of the external liquid molecules is larger than the diameter of the micropores, so they cannot pass through. Due to the simple preparation process and low cost, the breathable film is widely used in the fields of personal hygiene care and medical treatment. The air permeability of the breathable film is restricted by the stretching ratio and the technology of the polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08K9/04C08K9/06C08K3/26C08K3/22C08K3/30C09C3/12C09C3/10C08F292/00B29C69/00B29B9/06
Inventor 杨伟伟郭长华陆军
Owner SHANGHAI ZIHUA FILM TECH CO LTD