Low-haze multi-layer co-extrusion two-way stretching polyamide film and preparation method

A polyamide film, multi-layer co-extrusion technology, applied in the field of packaging industry, can solve the problem of high haze of polyamide film, achieve the effects of low haze, improve toughness, and improve production yield
CN101722700AInactive Publication Date: 2010-06-09SHANGHAI ZIDONG CHEM MATERIALS
1 Cites 23 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI ZIDONG CHEM MATERIALS
Publication Date
2010-06-09
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a low-haze multi-layer co-extrusion two-way stretching polyamide film and a preparation method. The two-way stretching polyamide film comprises at least three co-extrusion structures, namely a surface layer A, a surface layer C and a middle layer B, wherein the surface layer A and the surface layer C contain antiblocking agents. The invention also discloses a preparation method of the two-way stretching polyamide film, comprising the following steps of: preparing polyamide raw materials, extruding, casting pieces, thermoforming, slacking, drawing, winding, and the like. The two-way stretching polyamide film has the advantages of low haze, high gloss and high transparency and can be widely applied to the field of the packaging industry.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of packaging industry, in particular to a biaxially stretched polyamide film with low haze, high gloss and good processability and a preparation method. Background technique

[0002] Polyamide film, also known as nylon film, has excellent mechanical properties, dimensional stability, heat resistance, oil resistance, solvent resistance, puncture resistance and gas barrier properties, so it is widely used in the packaging industry.

[0003] However, polyamide is a highly crystalline polymer, and there are strong hydrogen bonds between its molecules, so that the viscosity and plasticity of polyamide films are very sensitive to temperature changes. Therefore, in the process of stretching the polyamide cast sheet into a film, if too many crystallized large particles are produced at the polyamide macromolecular level due to improper temperature control, it will cause the film to be damaged in the subsequent stretching proce...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More