Concealable Film Retorting Shade Unevenness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Packaging materials containing titanium oxide-based concealable films exhibit shade unevenness when packaging contents with oil and water undergo retorting treatment, affecting the exterior appearance.
Innovation Solution
Incorporating a specific blend of crystalline and amorphous polyamide resins with titanium oxide in the film, along with a hindered amine-based light stabilizer, to maintain concealability and light shielding properties while preventing shade unevenness during retorting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a concealable film containing titanium oxide is used to achieve concealability and light shielding, then the packaging material maintains uniform appearance, but shade unevenness occurs during retorting treatment when packaging oil and water contents
Solution Approach 1:
The invention changes the chemical composition parameters of the film by incorporating specific ratios of crystalline polyamide resin (10-94% by mass), amorphous polyamide resin (1-40% by mass), and titanium oxide (5-50% by mass). This compositional parameter adjustment prevents shade unevenness during retorting while maintaining concealability, as the amorphous polyamide resin content controls the film's response to thermal processing.
Solution Approach 2:
The invention uses a composite material system combining crystalline polyamide resin, amorphous polyamide resin, and titanium oxide in specific proportions. This composite structure leverages the light-scattering properties of titanium oxide for concealability while the amorphous polyamide resin component prevents thermal-induced appearance changes during retorting treatment.
2Illumination intensity
If titanium oxide is added to achieve concealability, then light shielding property is improved, but exterior appearance is impaired due to shade unevenness after retorting
Solution Approach 1:
The invention adjusts the titanium oxide content parameter within the range of 5-50% by mass and combines it with amorphous polyamide resin (1-40% by mass). This parameter optimization ensures sufficient light shielding property while preventing the titanium oxide from causing shade unevenness during retorting treatment.
3Manufacturing precision
If amorphous polyamide resin is increased to prevent shade unevenness, then appearance uniformity is improved, but mechanical strength may be reduced
Solution Approach 1:
The invention optimizes the amorphous polyamide resin content parameter within the specific range of 1-40% by mass. This parameter setting is sufficient to prevent shade unevenness during retorting while maintaining adequate mechanical strength, as exceeding this range would unnecessarily compromise structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures that packaging materials retain a uniform appearance and mechanical integrity even after retorting, without compromising concealability or light shielding properties.
Implementation Method 1
making an amorphous polyamide resin be contained in a specific content in a concealable film including titanium oxide
Implementation Method 2
a film in which a resin layer containing a large amount of a pigment composed of inorganic particles or organic particles is laminated on the surface of a thermoplastic film
Implementation Method 3
a film in which a resin layer containing a large amount of a pigment composed of inorganic particles or organic particles is laminated on the surface of a thermoplastic film
Implementation Method 4
a film in which a resin layer containing a large amount of a pigment composed of inorganic particles or organic particles is laminated on the surface of a thermoplastic film
Data Source
AI summary
A concealable film including 10 to 94% by mass of a crystalline polyamide resin, 1 to 40% by mass of an amorphous polyamide resin and 5 to 50% by mass of titanium oxide, with the proviso that the total content of these is 100% by mass.