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Thermoplastic elastic self-sealing film and preparation method thereof

A technology of thermoplastic elasticity and film, which is applied in the direction of film/sheet-shaped adhesives and adhesives, which can solve the problems of unstable air permeability structure, etc., and achieve excellent self-sealing performance, easy transportation, and easy operation.

Active Publication Date: 2010-09-15
NINGBO QINGHU ELASTOMER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the above-mentioned inorganic filler filling principle to prepare a breathable film, it is found that when the system contains a thermoplastic elastomer, due to the large resilience of the film, the voids that have been generated will disappear when the film shrinks back. Therefore, the above system. The obtained gas permeable structure has a large instability

Method used

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  • Thermoplastic elastic self-sealing film and preparation method thereof
  • Thermoplastic elastic self-sealing film and preparation method thereof
  • Thermoplastic elastic self-sealing film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0036] Table 1 is the formulation composition and performance test results of Examples 1-3. On the basis of Example 1, different thermoplastic elastomers and wax types were selected respectively. The above-mentioned examples have all obtained thermoplastic elastic self-sealing films with good properties. The rigidity and flexibility of the obtained samples are moderate, and the viscosity before use is small. After uniaxial or biaxial stretching, it has good self-adhesive performance, which can meet the requirements of use.

Embodiment 1、 comparative example 4

[0038] Table 2 is the formula ratio and performance test results of Embodiment 1 and Comparative Example 4. Compared with Example 1, Comparative Example 4 increases the proportion of metallocene linear low density polyethylene. The test results show that the 300% tensile modulus of the film increases due to the increase in the proportion of the metallocene linear low density polyethylene in the system, so that the stretching of the film is difficult during use, and the transparency is reduced at the same time.

Embodiment 1、 comparative example 5

[0040] Table 3 is the formula ratio and performance test results of Embodiment 1 and Comparative Example 5. Compared with Example 1, Comparative Example 5 only changes the type of inorganic filler. That is, nano-calcium carbonate was used to replace nano-silica, and the results showed that the transparency of the film filled with nano-calcium carbonate was significantly worse than that of the film filled with nano-silica.

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Abstract

The invention discloses a thermoplastic elastic self-sealing film and a preparation method thereof. The film is mainly prepared from the following components in part by weight: 100 parts of matrix resin, 100 to 140 parts of wax, 10 to 100 parts of thickening agent and 1 to 30 parts of filler. The preparation method comprises the following steps of: fusing and mixing the components except the matrix resin in a ratio; adding the matrix resin, and performing fusing and mixing; and delivering the obtained melt to a hot melt T-shaped crack die head for coating, rolling and forming the film. The thermoplastic elastic self-sealing film has the advantages of no stickiness on the original surface of the film, easy packaging and transporting, no stickiness to hands, and ideal permeability and resilience; and the preparation process is simple and easy to operate.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic elastic self-sealing film and a preparation method thereof. Background technique [0002] The so-called thermoplastic elastic self-sealing film refers to a packaging film with elastic recovery function, good self-sealing and air permeability, which is produced by a thermoplastic polymer matrix and various additives through film forming methods. Due to its unique properties, this type of film has a wide range of applications in the fields of medical treatment, scientific research and horticulture. In order to meet the actual needs of various applications, this type of film must have the following properties at the same time: first, it has excellent self-sealing performance; second, it has good elastic recovery performance, and at the same time it must have the necessary rigidity and tensile strength ; Third, it has good air permeability and can prevent the diffusi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/12C08L23/14C08L53/00C08L51/00C08L91/06C08L23/16C08L57/02C08K3/36C08K3/34C08K3/26C08K3/22C08K3/30C09J7/00
Inventor 应建波徐立新
Owner NINGBO QINGHU ELASTOMER SCI & TECH
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