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PVC sheet and preparation process thereof

A preparation process, PVC resin technology, applied in the field of PVC sheet and its preparation, can solve the problems of unfavorable PVC, PVC surface spots, separation scratches, etc., and achieve the effect of improving transparency, increasing roughness, and preventing adhesion

Inactive Publication Date: 2016-12-07
YANGZHOU SANXING PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, when the PVC sheet is produced and formed, the surface is often stuck together, it is not easy to separate, or scratches are often formed during separation, causing friction to affect the quality. Usually, coating technology is used to coat the PVC surface. An easy-to-separate smooth layer is used to solve this problem, but the coating method will cause mottling on the surface of PVC, and there are environmental protection and hygiene problems in the use of food, medical and other fields, which is not conducive to market expansion.
[0004] On the other hand, in the prior art, the smoothness of the PVC sheet can be improved by adding various anti-blocking agents such as calcium carbonate, or reducing the calendering temperature, so that the PVC sheet can be easily separated from each other. , but the transparency of PVC made by these methods is greatly affected, usually colored sheets, not transparent sheets, which is not conducive to PVC as packaging and other light-transmitting materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The oligomerization of 85kg PVC resin, 2.5kg silicon dioxide, 7kg methyl methacrylate-butadiene-styrene terpolymer, 2kg methyl tin, 2kg methyl methacrylate resin, 1kg fatty acid and polyol The mixture of complex ester and 0.5kg methacryloxypropyltrimethoxysilane and ethyl orthosilicate was heated to 110°C for 10min with hot stirring and mixing. The methacryloxypropyltrimethoxysilane and ethyl orthosilicate The molar ratio of the ester is 1:1; then the mixture is cooled to 60°C for cold stirring and mixing for 5 minutes; then the obtained premix is ​​extruded through an extruder with an extrusion temperature of 130°C and an extrusion current of 100-110A ;The extruded material is calendered by six rollers: the calendering temperatures of the calendering rollers passed in sequence are: calendering roller 1 200°C, calendering roller 2 200°C, calendering roller 3 180°C, calendering roller 4 180°C, calendering roller 5 180°C ℃, calendering six rolls 160 ℃, and finally get the...

Embodiment 2

[0029] 90kg PVC resin, 2kg silica, 7kg ethylene-vinyl acetate copolymer, 2.5kg stabilizer, 1.5kg methyl methacrylate resin, 1kg oxidized polyethylene wax and 0.6kg methacryloxypropyltrimethoxy The mixture of silane and tetraethyl orthosilicate was heated to 120°C for 8 minutes under thermal stirring, the molar ratio of methacryloxypropyltrimethoxysilane and tetraethyl orthosilicate was 6:1; then the mixture was cooled to 70 ℃ for cold stirring and mixing for 5 minutes; then extrude the obtained premixed material through an extruder, the extrusion temperature is 120 ℃, and the extrusion current is 100-110A; the extruded material is calendered by six rollers: successive calendering The calendering temperatures of the rolls are: 210°C for the first roll, 210°C for the second roll, 200°C for the third roll, 190°C for the fourth roll, 170°C for the fifth roll, and 150°C for the sixth roll to obtain the final product.

Embodiment 3

[0031] 75kg PVC resin, 4kg silicon dioxide, 9kg methyl methacrylate-butadiene-styrene terpolymer, 1kg methyl tin, 3kg methyl methacrylate resin, 0.5kg stearic acid and 0.2kg formazan The mixture of methacryloxypropyltrimethoxysilane and ethyl orthosilicate was heated to 100°C for hot stirring and mixing for 10 minutes; then the mixture was cooled to 50°C for cold stirring and mixing for 6 minutes, the methacryloxypropyltrimethyl The molar ratio of oxysilane to tetraethyl orthosilicate is 1:8; then the obtained premix is ​​extruded through an extruder at an extrusion temperature of 150°C and an extrusion current of 100-110A; the extruded material After six-roll calendering: the calendering temperatures of the calender rolls in turn are: calender 1 roll 180°C, calender 2 roll 180°C, calender 3 roll 170°C, calender 4 roll 170°C, calender 5 roll 170°C, calender 6 roll 160 °C, the product was finally obtained.

[0032] According to the standard GB / T 15267-94 "Polyvinyl Chloride Ha...

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Abstract

The invention relates to a PVC sheet and a preparation process thereof. The product is obtained by stirring and mixing PVC resin, a slipping agent, an enhancer, a stabilizer, a processing aid, a lubricating agent and a compatilizer at certain temperature to obtain a mixture, extruding the mixture through an extruder, and rolling the extruded mixture by a roller shaft at certain temperature. According to the PVC sheet and the preparation process thereof, a proper amount of silicon dioxide is added into PVC, and methyl acryloyl oxygen propyl trimethoxy silane and tetraethoxysilane are added simultaneously for cohydrolysis; a polar group compatible with the PVC is introduced into the silicon dioxide surface, so that the transparency of the silicon dioxide is improved, and the transparency of the prepared product is guaranteed; furthermore, due to the cooperation of the components, extremely tiny pores are formed in the surface of the PVC sheet, so that the shearing force of the PVC in a rolling process of the extruder is enhanced, and the microscopic roughness of the surface of a thin film is increased; therefore, a little of air can be accommodated between the thin films during winding to prevent the thin films from being adhered, and the smooth effect can be achieved.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and in particular relates to a PVC sheet and a preparation process thereof. Background technique [0002] Polyvinyl chloride, referred to as PVC (Polyvinyl chloride), is a general-purpose plastic, which is obtained by polymerizing vinyl chloride monomer. PVC sheet is a kind of thermoplastic material. It is a sheet-shaped material obtained by rolling PVC material through rollers. Its trim and waste can be recycled. Now it is widely used in food, medical, packaging, industrial products and other fields. [0003] However, in the prior art, when the PVC sheet is produced and formed, the surface is often stuck together, it is not easy to separate, or scratches are often formed during separation, causing friction to affect the quality. Usually, coating technology is used to coat the PVC surface. An easy-to-separate smooth layer is used to solve this problem, but the coating method will cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/08C08L33/12C08L23/30C08K13/02C08K3/36C08K5/5425C08K5/5415C08K5/57B29C69/02B29C43/24B29C43/58
CPCB29C43/24B29C43/58B29C2043/5816B29C48/0011C08L27/06C08L2201/10C08L2205/025C08L2205/03C08L2205/035C08L33/12C08K13/02C08K3/36C08K5/5425C08K5/5415C08K5/57C08L23/0853C08L23/30
Inventor 许东芸董怡文季兵吴长兵梁琦
Owner YANGZHOU SANXING PLASTIC
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