Production method of super-transparent soft PVC (polyvinyl chloride) film

A PVC film, transparent and soft technology, applied in the production field of ultra-transparent and soft PVC film, can solve the problems of not being able to control the degree of plasticization well, not being able to reuse and recycle, and the color of the product turning yellow, so as to save materials, Smooth heating and smooth surface

Active Publication Date: 2014-04-09
佛山龙塑工业塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] PVC soft transparent film, also known as crystal board and soft glass, the finished product requires smooth surface, no cracks, no bubbles, uniform color, heat resistance, cold resistance, anti-aging, heavy pressure resistance, strong acid and alkali resistance, and good light transmission Among them, no cracks, no bubbles, and uniform color are related to the degree of plasticization in the production process of the product. The processing methods in the prior art have the problem that the degree of plasticization cannot be well controlled. The plasticization is insufficient and the toughness of the product is relatively low. Poor, easy to produce cracks, the product will also appear opaque spots such as white spots, resulting in defective products; excessive plasticization will make the product yellow and brittle, and cannot be recycled

Method used

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  • Production method of super-transparent soft PVC (polyvinyl chloride) film
  • Production method of super-transparent soft PVC (polyvinyl chloride) film
  • Production method of super-transparent soft PVC (polyvinyl chloride) film

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 Shown, the production method of a kind of ultra-transparent flexible PVC film described in the present embodiment, comprises the steps:

[0030] 1) Powder sieving: put the PVC resin powder into a sieving machine for sieving, initially remove impurities, and obtain powder A; in step 1), cotton gauze gloves cannot be used, and at the same time, the sieve needs to be cleaned regularly; because once Cotton yarn falls into the raw material, which is difficult to remove in subsequent steps, resulting in residues on the product and becoming a defective product; in this step, impurities are initially removed through sieving to obtain a relatively pure powder A, which is then sent to the powder storage tank.

[0031] 2) Stirring and mixing: Put the powder A obtained in step 1) into the mixer together with the plasticizer, stabilizer, lubricant, and pigment for stirring to obtain the mixed powder B; wherein, the stirring speed is 696 rpm, and the stirring time is...

Embodiment 2

[0044] A kind of production method of ultra-transparent flexible PVC film is characterized in that comprising the steps:

[0045]1) Powder sieving: put the PVC resin powder into a sieving machine for sieving, initially remove impurities, and obtain powder A;

[0046] 2) Stirring and mixing: discharge powder A together with plasticizer, stabilizer, lubricant, and pigment into the mixer for stirring to obtain mixed powder B; wherein, the stirring speed is 696 rpm, and the stirring time is 230 seconds. The temperature is 150°C;

[0047] 3) Cooling: Cooling by stirring at a low speed, the stirring speed is 348 rpm, the stirring time is 40 seconds, and the temperature is controlled below 90°C to obtain a dry mixed powder C (white powder);

[0048] 4) Internal mixing: discharge the mixed powder C into the internal mixer, pressurize the internal mixer for internal mixing, the internal mixer is equipped with two rollers, and use the shear pressure between the rollers to process the m...

Embodiment 3

[0055] The characteristics of this embodiment are: in step 4), after adding the mixed powder C, at the same time add the recycled side material (the side material cut in the previous production process) and pressurize banburying, and the weight of the recovered side material is the mixed powder 10%-15% of the weight of body C, too much will affect the degree of plasticization of the product, which can save materials, reduce costs, and improve plasticization efficiency. Others are the same as in Example 1.

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Abstract

The invention discloses a production method of a super-transparent soft PVC (polyvinyl chloride) film, which comprises the following steps: 1) screening a PVC resin powder to obtain a powder A; 2) stirring the powder A with a plasticizer, a stabilizer, a lubricant and a pigment to obtain a mixed powder B; 3) cooling the mixed powder B by stirring to obtain a mixed powder C; 4) carrying out pressurized banburying on the mixed powder C by a Banbury mixer to obtain a colloid D; 5) carrying out roll plastification on the colloid D to obtain a colloid E; 6) secondary open milling: carrying out roll plastification on the colloid E to obtain a colloid F; 7) adding the colloid F into a filtering machine to obtain a melting charge G; and 8) carrying out roll forming on the melting charge G, cooling, carrying out edge trimming and rolling to obtain the super-transparent soft PVC film. The method can avoid the problem of insufficient plastification and ensure the plastification degree of the product, thereby obtaining the super-transparent soft glass; and the super-transparent soft PVC film has the characteristics of smooth surface, no crack, no bubble, uniform color, high heat resistance, high cold resistance, high aging resistance, high load resistance, strong acid/alkali resistance and favorable light transmittance.

Description

technical field [0001] The invention relates to a production method of a PVC film, in particular to a production method of an ultra-transparent soft PVC film. Background technique [0002] PVC soft transparent film, also known as crystal board and soft glass, the finished product requires smooth surface, no cracks, no bubbles, uniform color, heat resistance, cold resistance, anti-aging, heavy pressure resistance, strong acid and alkali resistance, and good light transmission Among them, no cracks, no bubbles, and uniform color are related to the degree of plasticization in the production process of the product. The processing methods in the prior art have the problem that the degree of plasticization cannot be well controlled. The plasticization is insufficient and the toughness of the product is relatively low. Poor, it is easy to produce cracks, and the product will also have opaque spots such as white spots, resulting in defective products; excessive plasticization will m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L27/06B29B7/28B29B7/16B29C43/24
Inventor 梁敬仁
Owner 佛山龙塑工业塑胶有限公司
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