CN103434152B

CN103434152B - A kind of cold stretching film and production method thereof

Info

Publication number: CN103434152B
Application number: CN201310391763.9A
Authority: CN
Inventors: 李忠
Original assignee: KUNSHAN JINMENG PLASTIC FILM CO Ltd
Current assignee: KUNSHAN JINMENG PLASTIC FILM CO Ltd
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2016-01-13
Anticipated expiration: 2033-09-02
Also published as: CN103434152A

Abstract

The present invention relates to a kind of cold stretching film, comprise skin, middle level, internal layer three part, each several part proportion of composing is (percentage by weight): outer 30%, middle level 40%, internal layer 30%.Present invention also offers the production method of this kind of film, comprise the following steps: step one, batch mixing; Step 2, batching; Step 3, blown film.The film produced by component formula of the present invention and production method has higher paracentesis resistance, good shrinkage and certain shrinkage stress, stretches and in contraction process, film does not produce hole, and can stretch by mechanical force merely at normal temperatures and use.

Description

A kind of cold stretching film and production method thereof

Technical field

The present invention relates to film production manufacture field, specifically a kind of cold stretching film and production method thereof.

Background technology

Blown film (BlowMembrane) is a kind of plastic working method, refers to a kind of plastic processing plastic pellet heating and melting being blown out again film.If the film blown out with virgin material, uniform color, totally, finished product stretches.If with the plastic pellet made of waste plastics reclaimed, usually will add pigment when making film, the film made may be just painted irregular, crisp and easily broken, and price is also lower.The blown film material produced by the inflation film manufacturing machine of specialty is applicable to various high-grade blister-pack.This film is due to its good barrier property, fresh-keeping, damp proof, frost protection, oxygen barrier, oil resistant, can be widely used in weight packaging.As various fresh fruit, meat product, pickles, fresh milk, liquid beverage, medical supplies etc.If non-professional inflation film manufacturing machine or inflation film manufacturing machine do not make on sound lines in process, the coating materials so made also may be substandard products.Most of PE is used for blown film film processed, standard low density PE(LDPE) or linear low close PE(LLDPE) all can use.HDPE film-grade is generally used for the place requiring superior draftability and fabulous barrier properties.Such as, HDPE film is usually used in commodity bag, groceries bag and food Package.PE processing film is generally by common blown film processing or flat crowded processing method.

Stretched film is heat shrink films again, and for sale and the transport of various product, its Main Function is firmly, hides and protection product.Shrink film must have higher paracentesis resistance, good shrinkage and certain shrinkage stress.In contraction process, film can not produce hole.Because shrink film is often applicable to outdoor, therefore need to add UV UV resistant agent.Because stretched film needs heating, redraw use, so just need special shrink oven, and waste energy, also there is no at present a kind of to there is higher paracentesis resistance, good shrinkage and certain shrinkage stress, stretch and in contraction process, film does not produce hole, and the cold stretching film of the use that can stretch by mechanical force merely at normal temperatures.

Summary of the invention

The present invention is above technical problem just, provides a kind of and has higher paracentesis resistance, good shrinkage and certain shrinkage stress, stretch and contraction process in film do not produce hole, and can at normal temperatures merely by mechanical force stretch use cold stretching film.

The present invention is achieved through the following technical solutions:

A kind of film, comprise skin, middle level, internal layer three part, each several part proportion of composing is (percentage by weight): outer 30%, middle level 40%, internal layer 30%, its ectomesoderm is made up of LLDPE1018FA, MVLDPE1018HA, opening agent 10063, each component ratio for (percentage by weight): LLDPE1018FA account for 34% ~ 45%, MVLDPE1018HA accounts for 55% ~ 65%, PA10063 accounts for 0.5% ~ 1.5%; Middle level is made up of ELITEA59999.02, PP6102, LLDPE1018FA, each component ratio for (percentage by weight): ELITEA59999.02 account for 65% ~ 75%, PP6102 accounts for 15% ~ 25%, LLDPE1018FA accounts for 5% ~ 15%; Internal layer is made up of MVLDPE1018HA, LLDPE1018FA, LDPE105E, PA10063, each component ratio for (percentage by weight): MVLDPE1018HA account for 50% ~ 60%, LLDPE1018FA accounts for 38% ~ 50%, LDPE105E accounts for 0.5% ~ 1.5%, PA10063 accounts for 0.5% ~ 1.5%.

A production method for film, comprises the following steps:

Step one, batch mixing, to stir each raw material to scale by the percentage by weight of skin, middle level, each component of internal layer and make former mixed materials for later use;

Step 2, batching, former mixed material step one prepared by the percentage by weight of skin, middle level, internal layer is prepared burden;

Step 3, blown film, adopt the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment to produce the film of needs.

The film produced by component formula of the present invention and production method has higher paracentesis resistance, good shrinkage and certain shrinkage stress, stretches and in contraction process, film does not produce hole, and can stretch by mechanical force merely at normal temperatures and use.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention will be further described.

Embodiment one,

First, by weight percentage by the LLDPE1018FA of 38%, the MVLDPE1018HA of 61%, the PA10063 of 1% stirs and makes outer former mixed material, by weight percentage by the ELITEA59999.02 of 72%, the PP6102 of 18%, the LLDPE1018FA of 10% stirs and makes the former mixed material in middle level, by weight percentage by the MVLDPE1018HA of 55%, the LLDPE1018FA of 43%, the LDPE105 of 1%, the PA10063 of 1% stirs and makes the former mixed material of internal layer, then by weight percentage by former for skin mixed material, the former mixed material in middle level, the former mixed material of internal layer is by outer 30%, middle level 40%, internal layer 30% is prepared burden, after having prepared burden, the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment can be adopted to produce the film of needs.

Embodiment two,

First by weight percentage by the LLDPE1018FA of 41%, the MVLDPE1018HA of 58.5%, the PA10063 of 0.5% stirs and makes outer former mixed material, by weight percentage by the ELITEA59999.02 of 69%, the PP6102 of 25%, the LLDPE1018FA of 6% stirs and makes the former mixed material in middle level, by weight percentage by the MVLDPE1018HA of 50%, the LLDPE1018FA of 49%, the LDPE105 of 0.5%, the PA10063 of 0.5% stirs and makes the former mixed material of internal layer, then by weight percentage by former for skin mixed material, the former mixed material in middle level, the former mixed material of internal layer is by outer 30%, middle level 40%, internal layer 30% is prepared burden, after having prepared burden, the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment can be adopted to produce the film of needs.

Embodiment three,

First, by weight percentage by the LLDPE1018FA of 40%, the MVLDPE1018HA of 58.5%, the PA10063 of 1.5% stirs and makes outer former mixed material, by weight percentage by the ELITEA59999.02 of 70%, the PP6102 of 22%, the LLDPE1018FA of 8% stirs and makes the former mixed material in middle level, by weight percentage by the MVLDPE1018HA of 53%, the LLDPE1018FA of 44%, the LDPE105 of 1.5%, the PA10063 of 1.5% stirs and makes the former mixed material of internal layer, then by weight percentage by former for skin mixed material, the former mixed material in middle level, the former mixed material of internal layer is by outer 30%, middle level 40%, internal layer 30% is prepared burden, after having prepared burden, the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment can be adopted to produce the film of needs.

Our company is through test of many times, by changing different component, draft temperature is constantly reduced, finally draw the object that can reach normal temperature stretching in compositional range of the present invention, its paracentesis resistance, shrinkage and shrinkage stress are slightly different according to the change of component, but overall performance is stablized, and blown film is respond well, product stretches and does not produce hole in contraction process.

Claims

1. a cold stretching film, comprise skin, middle level, internal layer three part, each several part proportion of composing is (percentage by weight): outer 30%, middle level 40%, internal layer 30%, its ectomesoderm is made up of LLDPE1018FA, MVLDPE1018HA, opening agent 10063, each component ratio for (percentage by weight): LLDPE1018FA account for 34% ~ 45%, MVLDPE1018HA accounts for 55% ~ 65%, PA10063 accounts for 0.5% ~ 1.5%; Middle level is made up of ELITEA59999.02, PP6102, LLDPE1018FA, each component ratio for (percentage by weight): ELITEA59999.02 account for 65% ~ 75%, PP6102 accounts for 15% ~ 25%, LLDPE1018FA accounts for 5% ~ 15%; Internal layer is made up of MVLDPE1018HA, LLDPE1018FA, LDPE105E, PA10063, each component ratio for (percentage by weight): MVLDPE1018HA account for 50% ~ 60%, LLDPE1018FA accounts for 38% ~ 50%, LDPE105E accounts for 0.5% ~ 1.5%, PA10063 accounts for 0.5% ~ 1.5%.

2. a kind of cold stretching film according to claim 1, is characterized in that each component ratio of described skin is: LLDPE1018FA accounts for 38%, MVLDPE1018HA accounts for 61%, PA10063 accounts for 1%; The each component ratio in described middle level is: ELITEA59999.02 accounts for 72%, PP6102 accounts for 18%, LLDPE1018FA accounts for 10%; The each portfolio ratio of described internal layer is: MVLDPE1018HA accounts for 55%, LLDPE1018FA accounts for 43%, LDPE105 accounts for 1%, PA10063 accounts for 1%.

3. a kind of cold stretching film according to claim 1, is characterized in that each component ratio of described skin is: LLDPE1018FA accounts for 41%, MVLDPE1018HA accounts for 58.5%, PA10063 accounts for 0.5%; The each component ratio in described middle level is: ELITEA59999.02 accounts for 69%, PP6102 accounts for 25%, LLDPE1018FA accounts for 6%; The each portfolio ratio of described internal layer is: MVLDPE1018HA accounts for 50%, LLDPE1018FA accounts for 49%, LDPE105 accounts for 0.5%, PA10063 accounts for 0.5%.

4. a kind of cold stretching film according to claim 1, is characterized in that each component ratio of described skin is: LLDPE1018FA accounts for 40%, MVLDPE1018HA accounts for 58.5%, PA10063 accounts for 1.5%; The each component ratio in described middle level is: ELITEA59999.02 accounts for 70%, PP6102 accounts for 22%, LLDPE1018FA accounts for 8%; The each portfolio ratio of described internal layer is: MVLDPE1018HA accounts for 53%, LLDPE1018FA accounts for 44%, LDPE105 accounts for 1.5%, PA10063 accounts for 1.5%.