Method for verifying the moisture resistance of aluminum-plastic packaging of roasted and roasted products - Master's thesis - Dissertation

Test - lowercase jpg

Kaixin micro test

Test probe P100-M3

Summary:

The roasted seeds and nuts products themselves are highly nutritious and contain a large amount of vitamins, proteins and oils. It is necessary to strengthen the monitoring of the moisture barrier properties of the packaging. This article uses

Labthink

Languang

W3/031

The water vapor transmission rate tester tests the barrier property of the aluminum-plastic packaging of the roasted seeds and nuts on the external water vapor, and introduces the basic process of the test, the detection principle and the applicable scope of the test equipment. The enterprise selects the moisture permeability test equipment and test. The method can be referred to.

Key words:

Roasted products, high barrier, moisture barrier, weighing method, water vapor transmission rate, water vapor transmission rate test system

1

,significance

Roasted seeds are a kind of snack foods made by drying, drying and frying of plant fruits for people to eat in their leisure time, such as melon seeds, broad beans, peanuts, walnuts, chestnuts, beans and so on. The packaging of roasted seeds and nuts products generally uses plastic composite film, aluminum-plated composite film, aluminum-plastic composite film, paper aluminum-plastic composite film, plastic cans and other packaging. The packaging should have good moisture-proof performance, because the roasted and roasted products are in a high-humidity environment, the product is easy. Absorption of water vapor in the environment causes the product to be mildewed and smeared, increasing the risk of product deterioration and taste changes, and shortening the shelf life. Therefore, it is necessary to strictly control the barrier property of the packaging material to water vapor and ensure the sealing of the finished packaging.

Figure

1

Roasted goods, paper, aluminum and plastic packaging

2

,Guideline

The domestic water vapor barrier test methods for composite film and sheet packaging include weighing method (cup method), electrolysis method, infrared method and humidity method. The reference method standards are respectively

GB/T 1037

"Test method for water vapor permeability of plastic film and sheet

Cup method,

GB/T 21529

Determination of water vapor transmission rate of plastic films and flakes

Electrolytic sensor method,

GB/T 26253

Determination of water vapor transmission rate of plastic films and flakes

Infrared detector method,

GB/T 30412

"Measurement of water vapor transmission rate of plastic films and flakes

Humidity sensor method, the reference standard in this paper is

GB/T 1037-1988

"Test method for water vapor permeability of plastic film and sheet

Cup method.

3

Test sample

Used by a food company

3

A variety of roasted and roasted products, paper aluminum plastic packaging.

4

Test equipment

Jinan Languang Electromechanical Technology Co., Ltd. independently developed and designed

W3/031

Water vapor transmission rate tester.

Figure

2 W3/031

Water vapor transmission rate tester

4.1

Test principle

W3/031

The principle of the moisture permeable cup weighing method is adopted, and a certain humidity difference is formed on both sides of the sample at a certain temperature, and the water vapor passes through the sample in the moisture permeable cup to enter the dry side, and the moisture permeable cup is measured. The amount of change in weight with time is used to obtain parameters such as the water vapor transmission rate of the sample.

4.2

Scope of application

(1)

This equipment is suitable for testing the water vapor transmission rate of plastic film, sheet, paper, cardboard and its textiles, non-woven fabrics and so on.

l

Film material: water vapor transmission rate of film materials such as plastic film, plastic composite film, paper-plastic composite film, geomembrane, co-extruded film, aluminized film, aluminum foil, aluminum foil composite film, waterproof breathable film, etc. test;

l

Sheet type: Suitable for water vapor transmission rate test of various engineering plastics, rubber, building materials (waterproof materials for construction), insulation materials, etc.

PP

Sheet,

PVC

Sheet,

PVDC

Sheet, nylon sheet, etc.;

l

Textiles and non-woven fabrics are suitable for water vapor transmission rate testing of textiles, non-woven fabrics, etc.;

l

It is also suitable for water vapor transmission rate test of liquid crystal display film, solar back panel, sterile protective film, beauty mask and other materials;

(2)

This device can meet a variety of national and international standards, such as

GB 1037

,

GB/T 16928

,

ASTM E96

,

ASTM D1653

,

TAPPI T464

,

ISO 2528

,

DIN 53122-1

,

JIS Z0208

,

YBB 00092003

.

4.3

Device parameters

l

Test Range:

0.1 ~ 10,000 g/m ²

·

24h

l

Number of samples:

1 ~ 3

Pieces (data are independent)

l

Resolution:

0.0001 g

l

Test temperature range:

15

°C

~ 55

°C

, temperature control accuracy

±0.1

°C

l

Test humidity range:

10%RH ~ 98%RH

(standard

90% RH

), temperature control accuracy

±1% RH

l

By matching

Lystem ^TM

Laboratory data sharing system, test data and equipment information can be reported simply by setting and operation, and easy to realize centralized and systematic management of laboratory test data.

5

,Experimental procedure

(1)

Using a sampler

3

Sample cutting

3

The diameter of the piece is

74 mm

The samples were tested.

(2)

Install the sample on the moisture permeable cup and close the glass seal door.

(3)

Set the sample name, sample thickness, test temperature, test humidity and other parameters.

(4)

Start the gas source, click

"

Start experiment

”

Option.

(5)

After the test is over, the instrument automatically calculates and displays the test results.

6

,test results

The water vapor transmission rates tested in this paper are:

3.5612 g/(m ² ·24h)

,

5.1637 g/(m ² ·24h)

,

0.8231 g/(m ² ·24h)

.

7

,in conclusion

W3/031

The water vapor transmission rate test system is a professional instrument for testing the water vapor transmission rate of the film. The device is easy to operate, has high test accuracy and good repeatability, and can accurately reflect the moisture resistance of the package. By comparing the test results of the three samples, it can be seen that the third sample has the best moisture resistance. The packaging of roasted seeds and nuts should also pay attention to the properties of oxygen barrier, sealing performance and heat seal strength, prevent oxidation and deterioration of products, and extend the shelf life of products.