CN102081035B

CN102081035B - Method for quickly testing of bonding resistance of biaxially oriented polypropylene (BOPP) contracted smoke film

Info

Publication number: CN102081035B
Application number: CN2010102698310A
Authority: CN
Inventors: 麦建国; 赵燕; 陈岳; 杨建武; 吴健全
Original assignee: ZHANJIANG PACKAGE MATERIAL ENTERPRISE CO Ltd
Current assignee: ZHANJIANG PACKAGE MATERIAL ENTERPRISE CO Ltd
Priority date: 2010-08-26
Filing date: 2010-08-26
Publication date: 2012-04-25
Anticipated expiration: 2030-08-26
Also published as: CN102081035A

Abstract

The invention relates to a method for quickly testing of bonding resistance of a biaxially oriented polypropylene (BOPP) contracted smoke film. In the method, after the smoke film to be tested is placed in a special and stable environment for a period of time, quick bonding occurs in a film roll; a single layer of the smoke film is unreeled freely from a certain height due to the own gravity; and when the single layer is adsorbed on the film roll in the unreeling process and cannot be unreeled freely, the film roll is bonded, so that the bonding degree can be tested in a short time. By the method, the defect of long time of detecting the bonding degree of the film roll in the prior art is overcome. The method is simple, intuitive and high in operability, and can be widely applied to various BOPP manufacturers.

Description

The method for rapidly testing of BOPP retraction tobacco film anti-stick property

Technical field

The present invention relates to a kind of method of testing of BOPP retraction tobacco film anti-stick property.

Background technology

The quick Validity Test method of present domestic temporary no BOPP retraction tobacco film anti-stick property; Yet BOPP retraction tobacco film bonds because post shrinkage is big easily; So in process of production, producer has all coincidentally added slipping agent, antisticking agent and antistatic agent alleviated the bonding phenomenon that film produces in Ageing Treatment, transportation and storage process.But this bonding process is veryer long at the normal temperature state, generally will after 1～2 month, can know the bonding degree of film.Temporal serious hysteresis has brought inconvenience on giving and producing, and has also hindered the renewal and the development of BOPP film production process and prescription simultaneously largely.

Summary of the invention

The purpose of this invention is to provide a kind of BOPP retraction tobacco film anti-stick property method for rapidly testing it be to utilize a special and stable environment, institute test cigarette film is placed certain hour after, the inner bonding fast that takes place of film volume.Utilize self gravitation from certain altitude, freely to unreel then by its individual layer.Be adsorbed onto when transferring on the film volume and can not freely unreel the time, show that the film volume bonds when its individual.So just can test its bonding degree at short notice.Not only required time shortens than original first mate, and is to utilize producer's existence conditions, need not increase any equipment purchasing expense.

The present invention includes following steps:

(1) prepare film volume sample: the film specification is 117-120mm, and rolling length is 2800m;

(2) film volume sample preparation: at the environment of a constant temperature and humidity, promptly temperature is 40 ± 2 ℃, and humidity 50 ± 10% is put into film volume to be detected, places after 7～9 days, takes out, and dries in the air to room temperature;

(3) experimental procedure:

A. measure the film volume sample initial diameter D0 that handled with steel ruler, and skin is pulled out 2 meters ± 0.10 meter;

B. both hands are held the paper tube core at film volume two ends, and overhead 0.8 ± 0.1 meter, individual of sagging film of while places between film volume and the operating personnel;

C. with nearly core of hand propelled film coil paper or nearly refill part film volume end face, rotate counterclockwise with 3～4 seconds/speed of changeing, sagging single film is freely unreeling; Can not contact when unreeling and unreel skin, the film volume will remain sustained height when unreeling, if unreel very smooth and easy; Show basic nothing of film or very slight bonding; Available wallpaper cutter prescinds 30～50 layers on film volume surface, carries out according to the step of a～c, to shorten experimental period again;

(4) bonding is judged:

Have when being adsorbed onto situation that film volume one can not transfer and occurring when individual layer unreels film, can think that film bonding phenomenon occurs, measure the diameter D1 of residue film volume, judge the quality of film bonding according to following standard with steel ruler:

W

＜45％

46％～55％

56％～65％

66％～75％

76％～90％

＞90％

The bonding degree

Almost do not have

Very slight

Slightly

Bonding

Seriously

Very serious

Annotate: W is the diameter D1 of residue film volume and the number percent of film volume sample initial diameter D0.

The beneficial effect of this method of testing is: the anti stick degree that accurately tests out BOPP retraction tobacco film in the short time.Method is simple, directly perceived, and workable, good test effect suits in the BOPP industry, to promote.

Embodiment

Time temperature equivalence principle according to macromolecular material: higher temperature can be equivalent to the influence of long time to macromolecular material deformation, designs the post shrinkage process that a kind of higher temperature environment is accelerated (comprising suitable temperature and humidity) BOPP retraction tobacco film.The interior change that needed just take place fully down in 1～2 month normal temperature displayed in short time, thereby confirmed the quality of the BOPP cigarette film anti-stick property of this prescription fast.

Environment (40 ± 2 ℃ of temperature at a constant temperature and humidity; Humidity 50 ± 10%), put into film volume to be detected, place certain hour after 7～9 days, take out, and dry in the air to room temperature.Film is rolled up the height and the drop-down film of individual layer that are placed on 0.7～0.9 meter make its kiss the earth, rotate film (can not contact and unreel layer) and also let it freely unreel.Have when being adsorbed onto film volume and going up situation about can not transfer and occur when individual layer unreels film, can think that film bonding phenomenon occurs, thereby converse the bonding rice number (closely refill can not unreel a meter number) of this film according to last film coil diameter and monolayer film thickness.So long as under same test condition, can compare the anti stick effect of different formulations, technology film volume.

Consider climate change,, then should suitably adjust humiture and the time simulates if the northern area four seasons temperature difference is big.

Certainly the anti-stick property that solves BOPP retraction tobacco film also can through add high-load or efficiently antisticking agent solve; But can obviously increase the mist degree and reduction glossiness of film like this; Product will be lacked competitiveness; So under as far as possible less with the prerequisite of antisticking agent, guarantee that simultaneously anti-stick property is only the target that the industry is pursued, thereby the present invention uses and gives birth to.

Embodiment 1

The height contraction specification of getting four kinds of different process prescriptions is film sample 1, sample 2, sample 3 and the sample 4 of 120mm.After the experiment condition of mentioning in the above technical requirement (, depositing in the environment of humidity 46% 7 days) processing 39 ℃ of temperature, unreel experiment according to experimental procedure a～c again, experimental result is following:

The sample sequence number	Sample 1	Sample 2	Sample 3	Sample 4
					D0(mm)	289	289	289	289
D1(mm)	265	221	115	125
					W	92％	76％	40％	43％
The bonding degree	Very serious	Seriously	Almost do not have	Almost do not have

Can be judged by above bonding degree: the anti-stick property of sample 1 is the poorest, and the anti-stick property of sample 3 and sample 4 is better.

Claims

1. the method for rapidly testing of a BOPP retraction tobacco film anti-stick property is characterized in that comprising the steps:

(3) experimental procedure:

A. measure the film volume sample initial diameter DO that handled with steel ruler, and skin is pulled out 2 meters ± 0.10 meter;

C. with hand propelled film coil paper core or nearly refill part film volume end face, rotate counterclockwise with 3～4 seconds/speed of changeing, sagging single film is freely unreeling; Can not contact when unreeling and unreel skin, the film volume will remain sustained height when unreeling, if unreel very smooth and easy; Show basic nothing of film or very slight bonding; Available wallpaper cutter prescinds 30～50 layers on film volume surface, carries out according to the step of a～c, to shorten experimental period again;

(4) bonding is judged:

Have when being adsorbed onto situation that film volume can not transfer and occurring when individual layer unreels film, think that promptly film bonding phenomenon occurs, measure the diameter D1 of residue film volume, judge the quality of film bonding according to following standard with steel ruler:

W is the diameter D1 of residue film volume and the number percent of film volume sample initial diameter D0.