Hello, welcome to visit the official website of Topcod Industry Co., Ltd. in Shunde District, Foshan City   Feedback  |  FAQ   中文  ENGLISH
Web Search: Goods
新闻中心 NEWS
Contact

Address:

No. 10, 1st Road, Jibei Industry Zone, Longjiang Town, Shunde District, Foshan City
Tel:0757-23395985

0757-23391489
Mobile phone:13534348761
Business division of drying agent:

[email protected]  

Business division of humidity card:

[email protected]

Business division of packing bag :

[email protected]  

Your present location:Home >> News center >> Company news >> Why to cooperate together to use humidity indicator card?

Why to cooperate together to use humidity indicator card?

Number of visits: Date:2016-07-08

Why should the humidity indicator card with desiccant used together?

With some customers when it comes to the humidity indicator CARDS, desiccant packaging, many clients for package is a myth, a piece of myth? Here are an example of a customer:

A plastic bag with PCB, add humidity indicator CARDS use vacuum packing. Why I the 60% humidity inside of the packaging that point after a period of time will change color?

The vacuum, can be in a certain period of time to ensure the packaging is in safe condition, but, first, outside air is circulation; Second, the plastic bags do not completely cut off air into the packaging, each plastic has a penetration rate. That is why to use desiccant packaging, or some customers packaging humidity indicator CARDS in 60% of the points are the cause of the discoloration.

Our advice is:

First, before packing into the indicator card and desiccant, use vacuum packing.

Second, use double plastic bags.

Third, the use of aluminum foil bag, it is recommended to use special corporation is aluminum foil bag.

Fourth, improve the product storage conditions, as far as possible stored in dry warehouse.

Attach a part of the thickness of the plastic bags corresponding air transmittance and desiccant dosage calculation method for your reference.

Plastic thickness and water vapor transmittance relational tables

 

 

The thickness of the thin film

A

(mm)

Water vapor permeability

R

(g/m2/d)

0.05

8.5

0.075

5.7

0.1

4.3

0.15

2.8

0.2

2.1

0.25

1.7

0.3

1.4

0.35

1.2

0.45

0.95

0.5

0.85

0.55

0.77

0.6

0.71

0.65

0.66

0.7

0.61

Formula of desiccant (silica gel)

Desiccant dosage of subtropical areas

(M)=10×A×R×T

 

Temperate desiccant dosage

(M)=7.5×A×R×T

 

  

Among them:

A is the surface of the packaging area, the m2;

R for packaging materials of air penetration rate, g/m2 / d;

T for shelf-life, d.

 

TypeInfo: Company news

Keywords for the information:

error