Conductive: Direct contact. If you touch a pot on the stove, this is conductive heat transfer.
convective Convective: Steam, moisture. If you put your hand above a boiling pot, you will feel heat in the form of steam. This is convective heat transfer.
Radiant: Electromagnetic. Step outside on a sunny day and feel the sun’s rays on your face. You are feeling radiant heat transfer. All objects above absolute zero (-459.7 degrees F.) emit infrared rays in a straight line in all directions.
A radiant barrier reflects radiant heat energy instead of trying to absorb it. What does this mean in your home or business? During the winter, 50-75% of heat loss through the ceiling/roofing system and 65-80% of heat loss through walls is radiant. In the summer, up to 93% of heat gain is radiant. If you are depending on R-value (resistance) alone to insulate against heat gain and loss, remember that thin layers of fiberglass are virtually transparent to radiant energy and are affected by changes in humidity (moisture levels). A 1-1/2% change in the moisture content of fiberglass insulation will result in a 36% decrease in performance (referenced from HVAC Manual 10.6; McGraw-Hill).
A pure aluminumized film radiant barrier is unaffected by humidity and will continue to perform at a consistent level no matter how humid it may be.
Month: November 2017
Cold Chain/Insulated Container
Definition of Cold Chain:
A cold chain is a temperature controlled supply chain. An unbroken cold chain is an un-interrupted series of storage and distribution activities which maintain a given temperature range. It is used to extend and to help ensure the shelf life of products such as chemicals, foods and drugs.
APEX Packaging is committed to supporting your global cold chain requirements through the custom design and manufacturing of high performance, cost effective thermal pack solutions.
Insulated Containers
Manufactured from high quality PUR polyurethane foam and high density PE polyethylene our insulated containers will offer:
- Longer Shipping Cycle – reduced freight costs
- Custom Sizes – with low minimum orders
- Creative Design Configurations – reduced refrigerant consumption
- Global Green Program
- Ship on Fridays or during holidays
Building insulation materials
Building insulation materials are the building materials which form the thermal envelope of a building or otherwise reduce heat transfer.
Insulation may be categorized by its composition (natural or synthetic materials), form (batts, blankets, loose-fill, spray foam, and panels), structural contribution (insulating concrete forms, structured panels, and straw bales), functional mode (conductive, radiative, convective), resistance to heat transfer, environmental impacts, and more. Sometimes a thermally reflective surface called a radiant barrier is added to a material to reduce the transfer of heat through radiation as well as conduction. The choice of which material or combination of materials is used depends on a wide variety of factors. Some insulation materials have health risks, some so significant the materials are no longer allowed to be used but remain in use in some older buildings such as asbestos fibers and urea.
（from:Wikipedia）
Machine Stretch Film
Machine stretch film is the most economical way to secure your loads if you have a large volume of product to wrap.
General Purpose Cast – the simple and most economical solution for most applications.
- Provides good levels of stretch, puncture resistance and cling
- Releases quietly from the roll
- Pre-stretch levels up to 250%
- One-Sided Cling – used in applications to eliminate pallets from sticking together.
- Provides excellent levels of stretch, puncture resistance, cling and load holding force.
- Releases quietly from the roll for high speed applications
- Pre-stretch levels up to 250%
High Performance – excellent for down-gauged and high pre-stretch applications.
- Provides the best levels of stretch, puncture resistance, cling, and load holding force
- Superior strength allows one to down-gauge their film minimizing film usage
- Pre-stretch capabilities of up to 300%
Blown – the best option for securing irregular loads.
- Provides optimum load-holding force and unrivaled puncture resistance
- Noisy release due to the high level of cling
- Pre-stretch levels up to 250%
Color Aluminium Film Coated PE
Product name:
Color Aluminium Film Coated PE
1.The structure of two layers metalized PET laminated PE
2.Color:Red,silvery,blue,green,purple, gold, pink.
3.Width:1000mm to 1500mm
4.Length:2000m to 3000m per coil,also according to the clients’ request
5.Thickness:8micron,10micron,12micron.
6.Characteristic:Reflective that its reflectivity ups to 97% radiant energy, sunshine, heat insulation, waterproof,good heat-sealing,super barrier-oxygen
