CN203888183U

CN203888183U - Biaxially oriented propylene (BOPP) film production device

Info

Publication number: CN203888183U
Application number: CN201420250472.8U
Authority: CN
Inventors: 杨帆
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-15
Filing date: 2014-05-15
Publication date: 2014-10-22
Anticipated expiration: 2024-05-15

Abstract

The utility model discloses a BOPP film production device, in particular to a biaxially stretched BOPP film production device, which comprises an extrusion device, a T-shaped machine head, a cooling roll, a preheating roll, a longitudinal Stretching rolls, transverse stretching preheating zone, transverse stretching zone and coiler, the extruding device in the above is two single-screw extruders matched in series. It solves the technical problem that the material in the extrusion device can be fully plasticized, mixed and homogenized in the BOPP film production process, effectively improves the stability and melt quality of the material during extrusion, and avoids excessive decomposition of the melt and melting Entrained air bubbles, unused materials or/and coke materials in the body.

Description

A kind of biaxial tension BOPP film production device

Technical field

The utility model relates to a kind of process units of BOPP film, particularly a kind of biaxial tension BOPP film production device.

Background technology

The polypropylene packaging films that use at present etc., except casting films, are the stretch orientation film obtaining with distinct methods.The production method of this film has biaxial tension method, blowing vacuolar membrane and simple tension method etc., wherein again with by biaxial tension legal system the use of biaxial tension BOPP film the most extensive.The concrete production procedure of biaxial tension BOPP film is: raw material through super-dry → extrude → slab → longitudinal stretching horizontal stroke → to stretch, heat treatment → rolling, in expressing technique in wherein above-mentioned because existing extrusion device is all to adopt a single screw extrusion machine or double screw extruder, make the plasticization temperature of material be difficult to control, frequently occur that material does not fully melt or burnt material phenomenon, have a strong impact on the end product quality of biaxial tension BOPP film.

Utility model content

The purpose of this utility model be the deficiency in order to solve above-mentioned technology and provide that a kind of polypropylene material can fully be plastified in extrusion, a kind of biaxial tension BOPP film production device of mixing and homogenising.

In order to achieve the above object, a kind of biaxial tension BOPP film production device that the utility model is designed, comprise the extrusion device, T-shaped head, chill roll, preheat roll, longitudinal stretching roller, cross directional stretch preheating zone, cross directional stretch district and the coiling machine that are successively arranged in order by technological process, the extrusion device in above-mentioned is two single screw extrusion machines that series connection coordinates.

Single screw extrusion machine in above-mentioned is fully utilized in injection molding technology field, is a kind of existing conventional equipment, has the advantages such as power consumption is low, the processing free degree is large, screw rod wearing and tearing are little.By the cooperating of connecting of two single screw extrusion machines in above-mentioned, its concrete series system is also fairly simple, only the discharging opening of last single screw extrusion machine need to be sealedly connected on the charging aperture of a rear single screw extrusion machine.

As further improvement, above-mentioned in respect to the center vertical line of chill roll, described T-shaped head discharging angle α is 30 ° ~ 60 °, preferably 45 °.Above-mentioned preferred version can be realized polypropylene material melt and seldom adhere to the lip of T-shaped head, the object of uniform discharge.

The internal stress producing in drawing process in order to eliminate polypropylene fibre, makes large molecule that to a certain degree lax occur, and realizes shape fixed-type, between the cross directional stretch district in above-mentioned and wind-up roll, is provided with heat set zone.

A kind of biaxial tension BOPP film production device provided by the utility model, in its structure, extrusion device adopts two single screw extrusion machines of connecting, material enters second extruder in semi-molten state after the plasticizing of First extruder, therefore the second level is extruded and can be adopted lower temperature, this has improved stability and melt quality when polypropylene material is extruded effectively, avoid occurring carrying bubble secretly in the undue decomposition of melt and melt, material is not or/and phenomenons such as burnt material, and the extruder of two series connection can strengthen extrusion capacity, can also carry out secondary exhaust simultaneously, be conducive to discharge the gas in melt.

Brief description of the drawings

Fig. 1 is the structural representation of embodiment 1 a kind of biaxial tension BOPP film production device that provides;

Fig. 2 is the structural representation at the embodiment 2 T-shaped head discharging angle in a kind of biaxial tension BOPP film production device that provides;

Fig. 3 is the structural representation of embodiment 3 a kind of biaxial tension BOPP film production device that provides.

Wherein: extrusion device 1, single screw extrusion machine 1-1, T-shaped head 2, chill roll 3, preheat roll 4, longitudinal stretching roller 5, cross directional stretch preheating zone 6, cross directional stretch district 7, heat set zone 8, coiling machine 9.

Detailed description of the invention

Below by embodiment, the utility model will be further described by reference to the accompanying drawings.

Embodiment 1:

As shown in Figure 1, a kind of biaxial tension BOPP film production device providing in the present embodiment, comprise the extrusion device 1, T-shaped head 2, chill roll 3, preheat roll 4, longitudinal stretching roller 5, cross directional stretch preheating zone 6, cross directional stretch district 7 and the coiling machine 9 that are successively arranged in order by technological process, the extrusion device 1 in above-mentioned is two single screw extrusion machine 1-1 that series connection coordinates.

Embodiment 2:

A kind of biaxial tension BOPP film production device providing in the present embodiment, its general structure is consistent with embodiment 1, as shown in Figure 2, but the T-shaped head 2 in the present embodiment is with respect to the center vertical line of chill roll 3, its discharging angle α is 45 DEG C, thereby realize polypropylene material melt and seldom adhered to the lip of T-shaped head 2, the object of uniform discharge.

Certainly in concrete use, the discharging angle α of described T-shaped head 2 can be the arbitrary value between 30 ° ~ 60 °, such as 35 ° or 40 ° or be 50 °.

Embodiment 3

A kind of biaxial tension BOPP film production device providing in the present embodiment, its general structure is consistent with embodiment 2, but the internal stress producing in drawing process in order to eliminate polypropylene fibre, make large molecule that to a certain degree lax occur, realize shape fixed-type, as shown in Figure 3, a kind of biaxial tension BOPP film production device that the present embodiment provides, is provided with heat set zone 8 between its cross directional stretch district 7 and wind-up roll 9.

Claims

1. a biaxial tension BOPP film production device, comprise extrusion device (1), T-shaped head (2), chill roll (3), preheat roll (4), longitudinal stretching roller (5), cross directional stretch preheating zone (6), cross directional stretch district (7) and coiling machine (9), it is characterized in that the extrusion device (1) in above-mentioned is two single screw extrusion machines (1-1) that series connection coordinates.

2. a kind of biaxial tension BOPP film production device according to claim 1, it is characterized in that above-mentioned in respect to the center vertical line of chill roll (3), the discharging angle α of described T-shaped head (2) is 30 ° ~ 60 °.

3. a kind of biaxial tension BOPP film production device according to claim 2, it is characterized in that above-mentioned in the discharging angle α of T-shaped head (2) be 45 °.

4. according to a kind of biaxial tension BOPP film production device described in any one in claims 1 to 3, it is characterized in that being provided with heat set zone (8) between cross directional stretch district (7) in above-mentioned and wind-up roll.