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Wrinkling occurs when Heshan Xinglong solvent-free composite nylon / PE is used.
Time: 2012-01-10 Source: Cutting Edge of Packaging Read: 7349 times
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Wenzhou Junchuan Machinery Equipment Co., Ltd.
Wrinkling occurs when Heshan Xinglong solvent-free composite nylon / PE is used. We found out that if the width is narrower, it doesn't matter, if it is a little wider, the core will be wrinkled a lot. The composite aluminum coating is particularly easy to deviate. At present, it is found that the thickness of the ink layer of the printed film is also related to the purchased film material. If the film is rolled and flattened during printing, the effect will be better. At present we are in the exploration stage of solvent-free composite technology. Because we use a small amount of glue, we use artificial glue. Question: What links need to be controlled by us?
Nordmec Wu Chaoming:
tension!
Dow Chemical Zhu Jianliang:
Should it be wrinkles at the bottom of the tube?
Shanghai Kangda Chemical Industry:
Have you tested glue?
Dow Chemical Zhu Jianliang:
There are many factors influencing it.
Nordmec Wu Chaoming:
The initial viscosity of the solvent-free composite is low. It is necessary to control the tension stability of each layer of material and the precise control of the winding tension.
Shanghai Kangda Chemical Industry:
There is no initial adhesion at all.
Shanghai Senming Industry:
Correction jitter will also wrinkle.
Dow Chemical Zhu Jianliang:
This is a comprehensive problem that is difficult to solve by a single method.
Bostik Wu Xianchao:
NY / PE structure, the material thickness uniformity of PE is very critical.
Copolymer adhesive sheet:
When the glue is cured, there will be a slight volume shrinkage. I wonder if it has an effect on wrinkling. Ask an expert.
Bostik Wu Xianchao:
It can also be considered from the glue. Although the initial viscosity of the solvent-free glue is small, there are still differences; in addition, the curing speed of the glue is also different.
Guowang of Guangdong
Which questions are the main and which are the secondary? For example, we do glue, what aspects need to be improved?
Bostik Wu Xianchao:
Material is the main and glue is the secondary.
Nordmec Wu Chaoming:
I still think that it should be solved more from the control of winding tension. Such as increasing tension.
Shanghai Kangda Chemical Industry:
The amount of glue cannot be too large, because there is no initial tack, and the glue has a lubricating effect between the two layers immediately after rewinding, so it is easy to get uneven.
Copolymer adhesive sheet:
The amount of glue is appropriately reduced, and the tension of the tape is adjusted to match.
Shanghai Kangda Chemical Industry:
Of course, proper winding tension control is also important.
Bostik Wu Xianchao:
The tension of the equipment is also very stable. It can directly communicate with the equipment supplier and negotiate to improve the equipment.
Anhui Huamao--Yun'er:
Note that the compound of nylon and PE is small, and the fastness is good?
Nordmec Wu Chaoming:
As long as there is rewinding, there is this problem. This is roughly consistent with the dry compound problem.
Anhui Huamao--Yun'er:
Mainly tension control.
Copolymer adhesive sheet:
This structure does not need much glue, is there any requirement for heat resistance?
Wuxi-Korea:
You can change the glue with better initial viscosity.
Shanghai Kangda Chemical Industry:
This material is mostly used for boiling.
Anhui Huamao--Yun'er:
For this structure, even if it is dry, the amount of glue applied is small.
Guowang of Guangdong
Increasing the initial viscosity of the glue generally depends on increasing the molecular weight of the glue, which can cause an increase in viscosity and a shortening of the working fluid life.
Guangzhou Tongze Zuo Guangshen:
1) NY / PE is a better structure, and the problem can definitely be solved.
2) Shrinkage and core wrinkling during the curing process are not an order of magnitude problem. Don't worry about this factor.
3) There are main reasons for core wrinkling: core tube size (3 or 6 inches), winding tension and taper setting, winding pressure, material, and other operating factors.
4) The sizing amount mainly affects the uniformity of winding, and generally does not affect the core wrinkle.
Anhui Huamao--Yun'er:
Mainly caused by operational reasons.
Guangzhou Tongze Zuo Guangshen:
Xinglong is our customer, and we have sent engineers to the site to understand the situation.
Nordmec Wu Chaoming:
I totally agree with Mr. Zuo. There is a packaging company, washing powder with composite NY / PE structure, PE film thickness is generally 50 ~ 100, no such problems have occurred.
Guangzhou Tongze Zuo Guangshen:
Thank you!
269362908:
The curing temperature is critical for thin films.
Guangzhou Tongze Zuo Guangshen:
I personally think that the curing process of solvent-free compounding is the most important and most easily overlooked link!
Anhui Huamao--Yun'er:
High temperatures can also affect it.
269362908:
Don't think that ripening will be good there. That is to say, it is good to just get off the machine, and wrinkles appear when it is ripe, right?
Guowang of Guangdong
After solvent-free compounding, it is generally left to stand at room temperature for several hours before ripening. Because the initial viscosity of the solvent-free is low, it is placed at room temperature to effectively release the reaction stress.
Guangdong Packaging Fan Junhong:
Heshan Xinglong's friends were unable to communicate with everyone at this time because they were busy in production. Mr. Tong Zezuo has sent engineers to help them solve the problem on the site. We will also arrange the contents of the discussion for you in detail to Xinglong. On behalf of Xinglong, thank you for your experience sharing and exchange!
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