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Special modified polypropylene resin used for cigarette filters

A technology of polypropylene and grafted polypropylene, which is applied in the field of modified polypropylene special resin and its preparation, can solve the problems of poor use effect, large amount of modifier added, poor compatibility of modifier, etc. The effect of less dosage, high rod forming rate and low content

Active Publication Date: 2013-04-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, in the prior art, polypropylene is used as the filter material for cigarettes, modified with polymer modifiers such as ethylene vinyl acetate resin, polyolefin resin, olefin-acid (ester) copolymer, polystyrene, etc. , Most of the patented modifiers are added in a large amount, the compatibility between the modifier and polypropylene is poor, the produced fiber has a skin-core structure, only the skin layer is the modifier, and the use effect is inferior

Method used

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  • Special modified polypropylene resin used for cigarette filters
  • Special modified polypropylene resin used for cigarette filters

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preparation example Construction

[0038]Preparation of grafted polypropylene

[0039] 1) Preparation of grafted polypropylene A: adopt 100 parts by weight of polypropylene (K7726) as base resin, 0.09 parts by weight of 2,5 dimethyl-2,5 di-tert-butylperoxyhexane initiator, 15 parts by weight of Maleic anhydride and 18 parts by weight of styrene are mixed in a high-speed mixer. When mixing, the initiator is put into 25ml of white oil to dilute, and the diluted solution is pre-mixed with the base resin for 2 minutes, and then the maleic anhydride (pre-prepared tablet) Grinding solids into ≥100 mesh powder particles) and adding styrene to continue mixing for 3 minutes, melt extrusion and granulation in a twin-screw extruder, the temperature of each section of the screw (°C) 150, 170, 190, 200, 210, 210, 210, 190, 180, reaction time: 1.5 min, and a polypropylene graft polymer with a MAH graft ratio of 3.8% was obtained.

[0040] 2) Preparation of grafted polypropylene B: adopt 100 parts by weight of polypropylene ...

Embodiment 1

[0043] Add 1 part by weight of grafted polypropylene A, 1 part by weight of SMA, and 98 parts by weight of polypropylene pellets (homopolypropylene with an MFR of 26 to 28 g / 10min) into a high-speed mixer and mix for 3 minutes, then Twin-screw blending extrusion, granulation. The reaction temperature (°C) of each section of the screw is 160, 180, 190, 210, 220, 220, 220, 200, 180, and the reaction time is 40 seconds. The prepared modified polypropylene tobacco tow special resin is spun by a spinning machine into modified tow. The tow was used to form a rod and tipped to be processed into a cigarette holder material, and the obtained properties are shown in Table 1.

Embodiment 2

[0045] Add 1 part by weight of grafted polypropylene B, 2 parts by weight of SMA, and 97 parts by weight of polypropylene pellets (homopolypropylene with an MFR of 26 to 28 g / 10min) into a high-speed mixer and mix for 3 minutes, then Twin-screw blending extrusion, granulation. The reaction temperature (°C) of each section of the screw is 160, 180, 190, 210, 220, 220, 220, 200, 180. Reaction time: 40 seconds. The prepared special resin for modified polypropylene cigarette tow is spun into modified tow by a spinning machine. The tow was used to form a rod and tipped to be processed into a cigarette holder material, and the obtained properties are shown in Table 1.

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Abstract

The invention discloses a special modified polypropylene resin used for cigarette filters. The resin comprises main components of, by weight: 96-98 parts of polypropylene, 1-2 parts of grafted polypropylene, and 1-2 parts of styrene-maleic anhydride copolymer. According to the invention, polypropylene is modified by using fused and grafted polypropylene and SMA, and the modified polypropylene is used for producing polypropylene resin for cigarette filters. Compared to other polypropylene resins for cigarette filters, types and amounts of modifiers adopted in the invention are low; the production technology is simple; a relatively high stick yield is provided with a cigarette filter material produced from the resin provided by the invention; total particle-phased substance, nicotine content, and tar content in the smock filtered from the cigarette filter material are low; and a requirement for the adoption of diacetate fiber materials is satisfied.

Description

technical field [0001] The invention relates to a modified polypropylene special resin and a preparation method thereof. The resin can be applied to polypropylene cigarette tow filter material. Background technique [0002] my country is one of the big cigarette production and consumption countries, and its output ranks first in the world, driving the rapid development of cigarette filters. Cigarette tow is divided into diacetate fiber tow and polypropylene tow. The main chain of diacetate fiber macromolecules contains strong polar ether bonds and ester bonds, and has rigid chain polymers. It has good cut-off properties as cigarette filter materials Filterability and rod forming rate. [0003] The cost of polypropylene tobacco tow is only 30-40% of that of diacetate fiber tow, which has great market development space. The polypropylene tow made by spinning polypropylene resin can be used as a cigarette filter material. It is characterized by light specific gravity, high st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08L35/06B29B9/06D01F6/46A24D3/08
Inventor 金鼎铭杨世元谢昕胡清剡军陈坤许惠芳李朋朋朱博超魏福庆郭义巩红光杨茹欣巨娟侠刘永军
Owner PETROCHINA CO LTD