CN102152576B

CN102152576B - All-polymer CPP (cast polypropylene) matt film

Info

Publication number: CN102152576B
Application number: CN2010105919118A
Authority: CN
Inventors: 梁雁扬
Original assignee: GUANGDONG WEIFU PACKAGING MATERIAL CO Ltd
Current assignee: GUANGDONG WEIFU PACKAGING MATERIAL CO Ltd
Priority date: 2010-12-16
Filing date: 2010-12-16
Publication date: 2012-05-30
Anticipated expiration: 2030-12-16
Also published as: CN102152576A

Abstract

The invention relates to a polypropylene matt film, particularly to a matt film, namely a CPP (cast polypropylene) matt film, prepared from mixture type matt master batch completely consisting of high polymers by using a casting method. The CPP matt film is prepared from there layers of raw materials by using the casting method, wherein the layer A is a matt surface layer, the layer B is a core layer, and the layer C is a bottom layer; and the matt film is characterized in that each layer comprises the following compositions in percentage by weight: the layer A: 100% of all-polymer master matt materials; the layer B: 97-98% of polypropylene, and 2.0-3.0% of antistatic agents; and the layer C: 95-97% of polypropylene, and 3.0-5.0% of caking inhibiters. The all-polymer matt master batch comprises the following compositions in percentage by weight: 25-35% of polypropylene, 30-40% of random polypropylene-ethylene copolymer, and 30-45% of linear low-density polyethylene. The CPP matt film provided by the invention not only has the matt performance of the existing BOPP (biaxially-oriented polypropylene) matt film, but also has the advantages of good flexibility, puncture resistance, good tear-resistant performance, and the like as compared with the BOPP matt film.

Description

All-polymer type CPP matt film

Technical field

The present invention relates to a kind of polypropylene Extinctive thin film, Extinctive thin film---the CPP matt film that especially a kind of mixture type delustring masterbatch of being made up of high molecular polymer entirely prepares through The tape casting.

Background technology

The appearance of BOPP matt film has come once strong impact to the traditional aesthetic conceptions of people, and those print bright and colourfully, and glittering garish plastic membrane product or other printed matter are given a kind of false sensation of people.Be commonly called as " perverse eye "; But after these printed matter surfaces are laminated with the last layer matt film, make printed patterns become soft, quiet, elegant, color reproduction true to nature; Show U.S.A of natural gloss; Adding the matt film mask has feel as snug as a bug in a rug, makes packed article seem more honorable, is attracting audience or consumer's eyeball consumingly.

The BOPP matt film is that material (organic or inorganic) through adding several kinds of compatibility differences in the one side of BOPP film is when stretched; Incompatible interface produces countless micropores; These micropores make and shine this surperficial light generation diffusion or scattering many times, thereby reach the purpose of delustring.

Existing BOPP matt film; Be named because of adopting BOPP delustring masterbatch; BOPP delustring masterbatch normally one or both organic high molecular compounds adds inorganic silica or the calcium carbonate fine powder forms, and it is the incompatible interface generation pore between macromolecular compound and silica or calcium carbonate fine powder and reach the delustring purpose when stretching through high multiple.

The BOPP film be high multiple in length and breadth to the product that stretches, though the performance of polypropylene film is had a lot of very big changes, the BOPP matt film has also been caused a lot of infringements; Like the scratch of delustring layer, stickingly hinder, melt abatjour, silver point that body breaks and produces; Almost be the common fault of matt film, in addition because polypropylene molecule height-oriented, it is poor to cause into BOPP film notched Izod impact strength; Resistance to tearing is poor, has limited its application at many packaging fields.

CPP film (being cast polypropylene film) and BOPP film are all polypropylene film, and The tape casting need not passed through high multiple and stretched, and promptly draw ratio is less, and it can not cause those damages as the BOPP matt film.And it flexible good, anti-perverse worn, tear-resistant performance is good, can produce the CPP matt film with The tape casting, and this is the problem of pendulum in face of ours.

Ended by 2009, in more than 100 families of state-owned CPP film production enterprise, import and home equipment nearly 300 (covers) are arranged; Production capacity is by nearly 1,000,000 tons/year; Wherein have only the delustring masterbatch of a family expenses Korea S to manufacture experimently the CPP matt film, but do not have the product supply the market, also have a tame product column that the inferior light film of CPP is arranged; Do not have the product supply the market yet, we can say that the CPP matt film is at China or blank out.

According to the investigation to market, the CPP matt film has very big potential market, aspects such as particularly high-grade gift wrap, cosmetic package, gift bag, shopping bag.But, there is not CPP matt film supply the market why, we investigate discovery.About CPP matt film aspect, the one, also there is not CPP matt film production technology, the 2nd, also do not develop the delustring masterbatch that supplies CPP to use, the CPP matt film is surely not arranged.

Summary of the invention

The objective of the invention is to overcome the shortcoming of existing BOPP matt film, the CPP matt film of provide a kind of flexibility perversely to wear well, anti-, tear-resistant performance is good producing with The tape casting.

The present invention, through The tape casting moulding preparation, wherein the A layer is the delustring surface layer by A, B, three layers of raw material of C, and the B layer is a sandwich layer, and the C layer is a bottom, and the material component weight proportion of each layer is: the A layer: all-polymer type delustring masterbatch 100%; B layer: polypropylene 97 ~ 98%, antistatic additive 2.0 ~ 3.0%; C layer: polypropylene 95 ~ 97%, caking inhibiter 3.0 ~ 5.0%.Each layer thickness be: A layer: 5 ~ 6 μ m; B layer: 10 ~ 25 μ m; C layer: 4 ~ 5 μ m.

The present invention, the formation of described all-polymer type delustring masterbatch comprises: polipropene 25 ~ 35%; Random polypropylene-ethylene copolymer 30 ~ 40%; Linear low density polyethylene (LLDPE) 30 ~ 45%.

The present invention, adopt three kinds of organic high molecular polymers: polypropylene, random polypropylene---ethylene copolymer and linear low density polyethylene (LLDPE) prepare all-polymer type delustring masterbatch through existing Granulation Equipments.Top layer---the delustring layer that all-polymer type delustring masterbatch is used to prepare the CPP matt film; Its delustring principle is: said three kinds of materials are after the blend melting; Because the interface is variant between the microcell that these materials combine; Be the difference between high-polymer molecular particle or the micel or claim incompatibility that this species diversity effect of power outside can strengthen when being drawn on the cold roller at a high speed from the die head lip, forms the countless fine apertures that are invisible to the naked eye; When light gets into goods inside through product surface; These micropores can make the light of entering produce many times refraction or scattering, and each refraction or scattering all can be accompanied by the loss of light intensity, thereby reach the purpose of CPP film surface delustring.

The present invention not only has the eliminate optical property of existing BOPP matt film, with the BOPP matt film relatively, also have advantages such as flexiblely perversely wear well, anti-, tear-resistant performance is good, can on existing CPP film line, produce, the equipment of need not changing promptly can be mass-produced.

Description of drawings

Fig. 1 is the main technique process block diagram of embodiment.

The specific embodiment

1, a kind of all-polymer type CPP matt film; Through The tape casting moulding preparation, wherein the A layer is the delustring surface layer by A, B, three layers of raw material of C, and the B layer is a sandwich layer; The C layer is a bottom, it is characterized in that: the material component weight proportion of each layer is: the A layer: all-polymer type delustring masterbatch 100%; B layer: polypropylene 97 ~ 98%, antistatic additive 2.0 ~ 3.0%; The C layer: polypropylene 95 ~ 97%, caking inhibiter 3.0 ~ 5.0%, each layer thickness be: A layer: 5 ~ 6 μ m; B layer: 10 ~ 25 μ m; C layer: 4 ~ 5 μ m.

Present embodiment, the formation of all-polymer type delustring masterbatch comprises: polipropene 25 ~ 35%; Random polypropylene-ethylene copolymer 30 ~ 40%; Linear low density polyethylene (LLDPE) 30 ~ 45%.Said antistatic additive is the AY088 antistatic additive, and said caking inhibiter is the AB801 caking inhibiter.

Wherein: the general current model of the AB801 caking inhibiter and the AY088 antistatic additive industry, can adopt the Foshan City and mould the product that emerging masterbatch Co., Ltd provides, can in the said firm's catalogue, find.Random polypropylene-ethylene copolymer can adopt the product of Belgian OLVAY company, and the trade mark: KS409 also can adopt newly to add ripple TPC Company products, the trade mark: FL7540L, FL7641L.

2, production technology temperature: sharp cooling roll temperature: 45 ~ 50 ℃; Preceding cold-roll temperature: 50 ~ 60 ℃; Extruder: 130 ~ 225 ℃ of A extruders; 190 ~ 250 ℃ of B extruders; The C extruder: a) 190 ~ 255 ℃ not heat sealable, b) 130 ~ 235 ℃ heat sealable; Die head and connector: 220 ~ 245 ℃.

3, technological process, the main technique process block diagram is as shown in Figure 1.

4, process description:

1. three extruder materials feed proportioning systems are controlled automatic blending by computer:

2. get into three extruder thawings, plasticizing, homogenizing respectively, melt material and send into die head through the raw material (major ingredient and auxiliary material) for preparing through pipeline;

3. three extruder extruded materials merge into three layers and go out through die head lip curtain coating at die head clothes hanger type conductance face place;

4. the high temperature melt that goes out from die head lip curtain coating is fallen cold roller and is cast film;

5. through calibrator, calibrator scanning information adjustment die head bolt after computer is handled carries out thickness and controls automatically the film that cold roller comes out after cutting edge for the first time;

6. film carries out the deburring second time after the thickness measuring, gets into corona treatment then, and film surface is carried out corona treatment;

7. the film after corona treatment carries roller to send into winder through each, carries out automatic winding.

5, standardization:

It is reported that complete domestic first production of poly-wide goods type CPP matt film had not both had national standard, did not have industry standard yet.In order to guarantee our company's constant product quality, satisfy the demand in market, collecting on the basis of arrangement through mass data, the applicant has set up CPP matt film enterprise inner quality standard.The key technical indexes is following:

Claims

1. all-polymer type CPP matt film; Prepared through The tape casting by A, B, three layers of raw material of C, wherein the A layer is the delustring surface layer, and the B layer is a sandwich layer; The C layer is a bottom, it is characterized in that: the material component weight proportion of each layer is: the A layer: all-polymer type delustring masterbatch 100%; B layer: polypropylene 97 ~ 98%, antistatic additive 2.0 ~ 3.0%; The C layer: polypropylene 95 ~ 97%, caking inhibiter 3.0 ~ 5.0%, each layer thickness be: A layer: 5 ~ 6 μ m; B layer: 10 ~ 25 μ m; C layer: 4 ~ 5 μ m; The formation of said all-polymer type delustring masterbatch comprises: polipropene 25 ~ 35%; Random polypropylene-ethylene copolymer 30 ~ 40%; Linear low density polyethylene (LLDPE) 30 ~ 45%.

2. all-polymer type CPP matt film according to claim 1, it is characterized in that: said antistatic additive is the AY088 antistatic additive, said caking inhibiter is the AB801 caking inhibiter.